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How to Write a Literature Review
- 6. Synthesize
- Literature Reviews: A Recap
- Reading Journal Articles
- Does it Describe a Literature Review?
- 1. Identify the Question
- 2. Review Discipline Styles
- Searching Article Databases
- Finding Full-Text of an Article
- Citation Chaining
- When to Stop Searching
- 4. Manage Your References
- 5. Critically Analyze and Evaluate
Synthesis Visualization
Synthesis matrix example.
- 7. Write a Literature Review
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- Synthesis Worksheet
About Synthesis
What is synthesis? | What synthesis is NOT: |
---|---|
Approaches to Synthesis
You can sort the literature in various ways, for example:
How to Begin?
Read your sources carefully and find the main idea(s) of each source
Look for similarities in your sources – which sources are talking about the same main ideas? (for example, sources that discuss the historical background on your topic)
Use the worksheet (above) or synthesis matrix (below) to get organized
This work can be messy. Don't worry if you have to go through a few iterations of the worksheet or matrix as you work on your lit review!
Four Examples of Student Writing
In the four examples below, only ONE shows a good example of synthesis: the fourth column, or Student D . For a web accessible version, click the link below the image.
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Literature Syntheis 101
How To Synthesise The Existing Research (With Examples)
By: Derek Jansen (MBA) | Expert Reviewer: Eunice Rautenbach (DTech) | August 2023
One of the most common mistakes that students make when writing a literature review is that they err on the side of describing the existing literature rather than providing a critical synthesis of it. In this post, we’ll unpack what exactly synthesis means and show you how to craft a strong literature synthesis using practical examples.
This post is based on our popular online course, Literature Review Bootcamp . In the course, we walk you through the full process of developing a literature review, step by step. If it’s your first time writing a literature review, you definitely want to use this link to get 50% off the course (limited-time offer).
Overview: Literature Synthesis
- What exactly does “synthesis” mean?
- Aspect 1: Agreement
- Aspect 2: Disagreement
- Aspect 3: Key theories
- Aspect 4: Contexts
- Aspect 5: Methodologies
- Bringing it all together
What does “synthesis” actually mean?
As a starting point, let’s quickly define what exactly we mean when we use the term “synthesis” within the context of a literature review.
Simply put, literature synthesis means going beyond just describing what everyone has said and found. Instead, synthesis is about bringing together all the information from various sources to present a cohesive assessment of the current state of knowledge in relation to your study’s research aims and questions .
Put another way, a good synthesis tells the reader exactly where the current research is “at” in terms of the topic you’re interested in – specifically, what’s known , what’s not , and where there’s a need for more research .
So, how do you go about doing this?
Well, there’s no “one right way” when it comes to literature synthesis, but we’ve found that it’s particularly useful to ask yourself five key questions when you’re working on your literature review. Having done so, you can then address them more articulately within your actual write up. So, let’s take a look at each of these questions.
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1. Points Of Agreement
The first question that you need to ask yourself is: “Overall, what things seem to be agreed upon by the vast majority of the literature?”
For example, if your research aim is to identify which factors contribute toward job satisfaction, you’ll need to identify which factors are broadly agreed upon and “settled” within the literature. Naturally, there may at times be some lone contrarian that has a radical viewpoint , but, provided that the vast majority of researchers are in agreement, you can put these random outliers to the side. That is, of course, unless your research aims to explore a contrarian viewpoint and there’s a clear justification for doing so.
Identifying what’s broadly agreed upon is an essential starting point for synthesising the literature, because you generally don’t want (or need) to reinvent the wheel or run down a road investigating something that is already well established . So, addressing this question first lays a foundation of “settled” knowledge.
Need a helping hand?
2. Points Of Disagreement
Related to the previous point, but on the other end of the spectrum, is the equally important question: “Where do the disagreements lie?” .
In other words, which things are not well agreed upon by current researchers? It’s important to clarify here that by disagreement, we don’t mean that researchers are (necessarily) fighting over it – just that there are relatively mixed findings within the empirical research , with no firm consensus amongst researchers.
This is a really important question to address as these “disagreements” will often set the stage for the research gap(s). In other words, they provide clues regarding potential opportunities for further research, which your study can then (hopefully) contribute toward filling. If you’re not familiar with the concept of a research gap, be sure to check out our explainer video covering exactly that .
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3. Key Theories
The next question you need to ask yourself is: “Which key theories seem to be coming up repeatedly?” .
Within most research spaces, you’ll find that you keep running into a handful of key theories that are referred to over and over again. Apart from identifying these theories, you’ll also need to think about how they’re connected to each other. Specifically, you need to ask yourself:
- Are they all covering the same ground or do they have different focal points or underlying assumptions ?
- Do some of them feed into each other and if so, is there an opportunity to integrate them into a more cohesive theory?
- Do some of them pull in different directions ? If so, why might this be?
- Do all of the theories define the key concepts and variables in the same way, or is there some disconnect? If so, what’s the impact of this ?
Simply put, you’ll need to pay careful attention to the key theories in your research area, as they will need to feature within your theoretical framework , which will form a critical component within your final literature review. This will set the foundation for your entire study, so it’s essential that you be critical in this area of your literature synthesis.
If this sounds a bit fluffy, don’t worry. We deep dive into the theoretical framework (as well as the conceptual framework) and look at practical examples in Literature Review Bootcamp . If you’d like to learn more, take advantage of our limited-time offer to get 60% off the standard price.
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4. Contexts
The next question that you need to address in your literature synthesis is an important one, and that is: “Which contexts have (and have not) been covered by the existing research?” .
For example, sticking with our earlier hypothetical topic (factors that impact job satisfaction), you may find that most of the research has focused on white-collar , management-level staff within a primarily Western context, but little has been done on blue-collar workers in an Eastern context. Given the significant socio-cultural differences between these two groups, this is an important observation, as it could present a contextual research gap .
In practical terms, this means that you’ll need to carefully assess the context of each piece of literature that you’re engaging with, especially the empirical research (i.e., studies that have collected and analysed real-world data). Ideally, you should keep notes regarding the context of each study in some sort of catalogue or sheet, so that you can easily make sense of this before you start the writing phase. If you’d like, our free literature catalogue worksheet is a great tool for this task.
5. Methodological Approaches
Last but certainly not least, you need to ask yourself the question: “What types of research methodologies have (and haven’t) been used?”
For example, you might find that most studies have approached the topic using qualitative methods such as interviews and thematic analysis. Alternatively, you might find that most studies have used quantitative methods such as online surveys and statistical analysis.
But why does this matter?
Well, it can run in one of two potential directions . If you find that the vast majority of studies use a specific methodological approach, this could provide you with a firm foundation on which to base your own study’s methodology . In other words, you can use the methodologies of similar studies to inform (and justify) your own study’s research design .
On the other hand, you might argue that the lack of diverse methodological approaches presents a research gap , and therefore your study could contribute toward filling that gap by taking a different approach. For example, taking a qualitative approach to a research area that is typically approached quantitatively. Of course, if you’re going to go against the methodological grain, you’ll need to provide a strong justification for why your proposed approach makes sense. Nevertheless, it is something worth at least considering.
Regardless of which route you opt for, you need to pay careful attention to the methodologies used in the relevant studies and provide at least some discussion about this in your write-up. Again, it’s useful to keep track of this on some sort of spreadsheet or catalogue as you digest each article, so consider grabbing a copy of our free literature catalogue if you don’t have anything in place.
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Bringing It All Together
Alright, so we’ve looked at five important questions that you need to ask (and answer) to help you develop a strong synthesis within your literature review. To recap, these are:
- Which things are broadly agreed upon within the current research?
- Which things are the subject of disagreement (or at least, present mixed findings)?
- Which theories seem to be central to your research topic and how do they relate or compare to each other?
- Which contexts have (and haven’t) been covered?
- Which methodological approaches are most common?
Importantly, you’re not just asking yourself these questions for the sake of asking them – they’re not just a reflection exercise. You need to weave your answers to them into your actual literature review when you write it up. How exactly you do this will vary from project to project depending on the structure you opt for, but you’ll still need to address them within your literature review, whichever route you go.
The best approach is to spend some time actually writing out your answers to these questions, as opposed to just thinking about them in your head. Putting your thoughts onto paper really helps you flesh out your thinking . As you do this, don’t just write down the answers – instead, think about what they mean in terms of the research gap you’ll present , as well as the methodological approach you’ll take . Your literature synthesis needs to lay the groundwork for these two things, so it’s essential that you link all of it together in your mind, and of course, on paper.
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Psst… there’s more!
This post is an extract from our bestselling short course, Literature Review Bootcamp . If you want to work smart, you don't want to miss this .
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How to Write a Literature Review - A Self-Guided Tutorial
- Literature Reviews: A Recap
- Reading Journal Articles
- Does it describe a Literature Review?
- 1. Identify the question
- 2. Review discipline styles
- Searching article databases - video
- Finding the article full-text
- Citation trails
- When to stop searching
- Citation Managers
- 5. Critically analyze and evaluate
- 6. Synthesize
- 7. Write literature review
- Additional Resources
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You can sort the literature in various ways, for example:
Synthesis Vizualization
Four examples of student writing.
In the four examples below, only ONE shows a good example of synthesis: the fourth column, or Student D . For a web accessible version, click the link below the image.
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Long description of "Four Examples of Student Writing" for web accessibility
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Synthesis Matrix Example
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From Jennifer Lim
Synthesis Templates
Synthesis grids are organizational tools used to record the main concepts of your sources and can help you make connections about how your sources relate to one another.
- Source Template Basic Literature Review Source Template from Walden University Writing Center to help record the main findings and concepts from different articles.
- Sample Literature Review Grids This spreadsheet contains multiple tabs with different grid templates. Download or create your own copy to begin recording notes.
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Literature Review Basics
- What is a Literature Review?
- Synthesizing Research
- Using Research & Synthesis Tables
- Additional Resources
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Synthesis: What is it?
First, let's be perfectly clear about what synthesizing your research isn't :
- - It isn't just summarizing the material you read
- - It isn't generating a collection of annotations or comments (like an annotated bibliography)
- - It isn't compiling a report on every single thing ever written in relation to your topic
When you synthesize your research, your job is to help your reader understand the current state of the conversation on your topic, relative to your research question. That may include doing the following:
- - Selecting and using representative work on the topic
- - Identifying and discussing trends in published data or results
- - Identifying and explaining the impact of common features (study populations, interventions, etc.) that appear frequently in the literature
- - Explaining controversies, disputes, or central issues in the literature that are relevant to your research question
- - Identifying gaps in the literature, where more research is needed
- - Establishing the discussion to which your own research contributes and demonstrating the value of your contribution
Essentially, you're telling your reader where they are (and where you are) in the scholarly conversation about your project.
Synthesis: How do I do it?
Synthesis, step by step.
This is what you need to do before you write your review.
- Identify and clearly describe your research question (you may find the Formulating PICOT Questions table at the Additional Resources tab helpful).
- Collect sources relevant to your research question.
- Organize and describe the sources you've found -- your job is to identify what types of sources you've collected (reviews, clinical trials, etc.), identify their purpose (what are they measuring, testing, or trying to discover?), determine the level of evidence they represent (see the Levels of Evidence table at the Additional Resources tab ), and briefly explain their major findings . Use a Research Table to document this step.
- Study the information you've put in your Research Table and examine your collected sources, looking for similarities and differences . Pay particular attention to populations , methods (especially relative to levels of evidence), and findings .
- Analyze what you learn in (4) using a tool like a Synthesis Table. Your goal is to identify relevant themes, trends, gaps, and issues in the research. Your literature review will collect the results of this analysis and explain them in relation to your research question.
Analysis tips
- - Sometimes, what you don't find in the literature is as important as what you do find -- look for questions that the existing research hasn't answered yet.
- - If any of the sources you've collected refer to or respond to each other, keep an eye on how they're related -- it may provide a clue as to whether or not study results have been successfully replicated.
- - Sorting your collected sources by level of evidence can provide valuable insight into how a particular topic has been covered, and it may help you to identify gaps worth addressing in your own work.
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Literature Review How To
- Things To Consider
- Synthesizing Sources
- Video Tutorials
- Books On Literature Reviews
What is Synthesis
What is Synthesis? Synthesis writing is a form of analysis related to comparison and contrast, classification and division. On a basic level, synthesis requires the writer to pull together two or more summaries, looking for themes in each text. In synthesis, you search for the links between various materials in order to make your point. Most advanced academic writing, including literature reviews, relies heavily on synthesis. (Temple University Writing Center)
How To Synthesize Sources in a Literature Review
Literature reviews synthesize large amounts of information and present it in a coherent, organized fashion. In a literature review you will be combining material from several texts to create a new text – your literature review.
You will use common points among the sources you have gathered to help you synthesize the material. This will help ensure that your literature review is organized by subtopic, not by source. This means various authors' names can appear and reappear throughout the literature review, and each paragraph will mention several different authors.
When you shift from writing summaries of the content of a source to synthesizing content from sources, there is a number things you must keep in mind:
- Look for specific connections and or links between your sources and how those relate to your thesis or question.
- When writing and organizing your literature review be aware that your readers need to understand how and why the information from the different sources overlap.
- Organize your literature review by the themes you find within your sources or themes you have identified.
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Library Guides
Literature reviews: synthesis.
- Criticality
Synthesise Information
So, how can you create paragraphs within your literature review that demonstrates your knowledge of the scholarship that has been done in your field of study?
You will need to present a synthesis of the texts you read.
Doug Specht, Senior Lecturer at the Westminster School of Media and Communication, explains synthesis for us in the following video:
Synthesising Texts
What is synthesis?
Synthesis is an important element of academic writing, demonstrating comprehension, analysis, evaluation and original creation.
With synthesis you extract content from different sources to create an original text. While paraphrase and summary maintain the structure of the given source(s), with synthesis you create a new structure.
The sources will provide different perspectives and evidence on a topic. They will be put together when agreeing, contrasted when disagreeing. The sources must be referenced.
Perfect your synthesis by showing the flow of your reasoning, expressing critical evaluation of the sources and drawing conclusions.
When you synthesise think of "using strategic thinking to resolve a problem requiring the integration of diverse pieces of information around a structuring theme" (Mateos and Sole 2009, p448).
Synthesis is a complex activity, which requires a high degree of comprehension and active engagement with the subject. As you progress in higher education, so increase the expectations on your abilities to synthesise.
How to synthesise in a literature review:
Identify themes/issues you'd like to discuss in the literature review. Think of an outline.
Read the literature and identify these themes/issues.
Critically analyse the texts asking: how does the text I'm reading relate to the other texts I've read on the same topic? Is it in agreement? Does it differ in its perspective? Is it stronger or weaker? How does it differ (could be scope, methods, year of publication etc.). Draw your conclusions on the state of the literature on the topic.
Start writing your literature review, structuring it according to the outline you planned.
Put together sources stating the same point; contrast sources presenting counter-arguments or different points.
Present your critical analysis.
Always provide the references.
The best synthesis requires a "recursive process" whereby you read the source texts, identify relevant parts, take notes, produce drafts, re-read the source texts, revise your text, re-write... (Mateos and Sole, 2009).
What is good synthesis?
The quality of your synthesis can be assessed considering the following (Mateos and Sole, 2009, p439):
Integration and connection of the information from the source texts around a structuring theme.
Selection of ideas necessary for producing the synthesis.
Appropriateness of the interpretation.
Elaboration of the content.
Example of Synthesis
Original texts (fictitious):
Animal testing is necessary to save human lives. Incidents have happened where humans have died or have been seriously harmed for using drugs that had not been tested on animals (Smith 2008). | Animals feel pain in a way that is physiologically and neuroanatomically similar to humans (Chowdhury 2012). |
Animal testing is not always used to assess the toxicology of a drug; sometimes painful experiments are undertaken to improve the effectiveness of cosmetics (Turner 2015) | Animals in distress can suffer psychologically, showing symptoms of depression and anxiety (Panatta and Hudson 2016). |
Synthesis:
Animal experimentation is a subject of heated debate. Some argue that painful experiments should be banned. Indeed it has been demonstrated that such experiments make animals suffer physically and psychologically (Chowdhury 2012; Panatta and Hudson 2016). On the other hand, it has been argued that animal experimentation can save human lives and reduce harm on humans (Smith 2008). This argument is only valid for toxicological testing, not for tests that, for example, merely improve the efficacy of a cosmetic (Turner 2015). It can be suggested that animal experimentation should be regulated to only allow toxicological risk assessment, and the suffering to the animals should be minimised.
Bibliography
Mateos, M. and Sole, I. (2009). Synthesising Information from various texts: A Study of Procedures and Products at Different Educational Levels. European Journal of Psychology of Education, 24 (4), 435-451. Available from https://doi.org/10.1007/BF03178760 [Accessed 29 June 2021].
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Literature Reviews
- Getting started
What is a literature review?
Why conduct a literature review, stages of a literature review, lit reviews: an overview (video), check out these books.
- Types of reviews
- 1. Define your research question
- 2. Plan your search
- 3. Search the literature
- 4. Organize your results
- 5. Synthesize your findings
- 6. Write the review
- Artificial intelligence (AI) tools
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Definition: A literature review is a systematic examination and synthesis of existing scholarly research on a specific topic or subject.
Purpose: It serves to provide a comprehensive overview of the current state of knowledge within a particular field.
Analysis: Involves critically evaluating and summarizing key findings, methodologies, and debates found in academic literature.
Identifying Gaps: Aims to pinpoint areas where there is a lack of research or unresolved questions, highlighting opportunities for further investigation.
Contextualization: Enables researchers to understand how their work fits into the broader academic conversation and contributes to the existing body of knowledge.
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tl;dr A literature review critically examines and synthesizes existing scholarly research and publications on a specific topic to provide a comprehensive understanding of the current state of knowledge in the field.
What is a literature review NOT?
❌ An annotated bibliography
❌ Original research
❌ A summary
❌ Something to be conducted at the end of your research
❌ An opinion piece
❌ A chronological compilation of studies
The reason for conducting a literature review is to:
What has been written about your topic? What is the evidence for your topic? What methods, key concepts, and theories relate to your topic? Are there current gaps in knowledge or new questions to be asked? | |
Bring your reader up to date Further your reader's understanding of the topic | |
Provide evidence of... - your knowledge on the topic's theory - your understanding of the research process - your ability to critically evaluate and analyze information - that you're up to date on the literature |
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Literature Reviews: An Overview for Graduate Students
While this 9-minute video from NCSU is geared toward graduate students, it is useful for anyone conducting a literature review.
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Writing the literature review: A practical guide
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Literature Reviews
- Introduction
- Tutorials and resources
- Step 1: Literature search
- Step 2: Analysis, synthesis, critique
- Step 3: Writing the review
If you need any assistance, please contact the library staff at the Georgia Tech Library Help website .
Analysis, synthesis, critique
Literature reviews build a story. You are telling the story about what you are researching. Therefore, a literature review is a handy way to show that you know what you are talking about. To do this, here are a few important skills you will need.
Skill #1: Analysis
Analysis means that you have carefully read a wide range of the literature on your topic and have understood the main themes, and identified how the literature relates to your own topic. Carefully read and analyze the articles you find in your search, and take notes. Notice the main point of the article, the methodologies used, what conclusions are reached, and what the main themes are. Most bibliographic management tools have capability to keep notes on each article you find, tag them with keywords, and organize into groups.
Skill #2: Synthesis
After you’ve read the literature, you will start to see some themes and categories emerge, some research trends to emerge, to see where scholars agree or disagree, and how works in your chosen field or discipline are related. One way to keep track of this is by using a Synthesis Matrix .
Skill #3: Critique
As you are writing your literature review, you will want to apply a critical eye to the literature you have evaluated and synthesized. Consider the strong arguments you will make contrasted with the potential gaps in previous research. The words that you choose to report your critiques of the literature will be non-neutral. For instance, using a word like “attempted” suggests that a researcher tried something but was not successful. For example:
There were some attempts by Smith (2012) and Jones (2013) to integrate a new methodology in this process.
On the other hand, using a word like “proved” or a phrase like “produced results” evokes a more positive argument. For example:
The new methodologies employed by Blake (2014) produced results that provided further evidence of X.
In your critique, you can point out where you believe there is room for more coverage in a topic, or further exploration in in a sub-topic.
Need more help?
If you are looking for more detailed guidance about writing your dissertation, please contact the folks in the Georgia Tech Communication Center .
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- Last Updated: Apr 2, 2024 11:21 AM
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How to Synthesize Written Information from Multiple Sources
Shona McCombes
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B.A., English Literature, University of Glasgow
Shona McCombes is the content manager at Scribbr, Netherlands.
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Saul McLeod, PhD
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Saul McLeod, PhD., is a qualified psychology teacher with over 18 years of experience in further and higher education. He has been published in peer-reviewed journals, including the Journal of Clinical Psychology.
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When you write a literature review or essay, you have to go beyond just summarizing the articles you’ve read – you need to synthesize the literature to show how it all fits together (and how your own research fits in).
Synthesizing simply means combining. Instead of summarizing the main points of each source in turn, you put together the ideas and findings of multiple sources in order to make an overall point.
At the most basic level, this involves looking for similarities and differences between your sources. Your synthesis should show the reader where the sources overlap and where they diverge.
Unsynthesized Example
Franz (2008) studied undergraduate online students. He looked at 17 females and 18 males and found that none of them liked APA. According to Franz, the evidence suggested that all students are reluctant to learn citations style. Perez (2010) also studies undergraduate students. She looked at 42 females and 50 males and found that males were significantly more inclined to use citation software ( p < .05). Findings suggest that females might graduate sooner. Goldstein (2012) looked at British undergraduates. Among a sample of 50, all females, all confident in their abilities to cite and were eager to write their dissertations.
Synthesized Example
Studies of undergraduate students reveal conflicting conclusions regarding relationships between advanced scholarly study and citation efficacy. Although Franz (2008) found that no participants enjoyed learning citation style, Goldstein (2012) determined in a larger study that all participants watched felt comfortable citing sources, suggesting that variables among participant and control group populations must be examined more closely. Although Perez (2010) expanded on Franz’s original study with a larger, more diverse sample…
Step 1: Organize your sources
After collecting the relevant literature, you’ve got a lot of information to work through, and no clear idea of how it all fits together.
Before you can start writing, you need to organize your notes in a way that allows you to see the relationships between sources.
One way to begin synthesizing the literature is to put your notes into a table. Depending on your topic and the type of literature you’re dealing with, there are a couple of different ways you can organize this.
Summary table
A summary table collates the key points of each source under consistent headings. This is a good approach if your sources tend to have a similar structure – for instance, if they’re all empirical papers.
Each row in the table lists one source, and each column identifies a specific part of the source. You can decide which headings to include based on what’s most relevant to the literature you’re dealing with.
For example, you might include columns for things like aims, methods, variables, population, sample size, and conclusion.
For each study, you briefly summarize each of these aspects. You can also include columns for your own evaluation and analysis.
![How to Synthesize Written Information from Multiple Sources 1 summary table for synthesizing the literature](https://www.simplypsychology.org/wp-content/uploads/synthesizing-table.jpg)
The summary table gives you a quick overview of the key points of each source. This allows you to group sources by relevant similarities, as well as noticing important differences or contradictions in their findings.
Synthesis matrix
A synthesis matrix is useful when your sources are more varied in their purpose and structure – for example, when you’re dealing with books and essays making various different arguments about a topic.
Each column in the table lists one source. Each row is labeled with a specific concept, topic or theme that recurs across all or most of the sources.
Then, for each source, you summarize the main points or arguments related to the theme.
![How to Synthesize Written Information from Multiple Sources 2 synthesis matrix](https://www.simplypsychology.org/wp-content/uploads/synthesizing-matrix-table.jpg)
The purposes of the table is to identify the common points that connect the sources, as well as identifying points where they diverge or disagree.
Step 2: Outline your structure
Now you should have a clear overview of the main connections and differences between the sources you’ve read. Next, you need to decide how you’ll group them together and the order in which you’ll discuss them.
For shorter papers, your outline can just identify the focus of each paragraph; for longer papers, you might want to divide it into sections with headings.
There are a few different approaches you can take to help you structure your synthesis.
If your sources cover a broad time period, and you found patterns in how researchers approached the topic over time, you can organize your discussion chronologically .
That doesn’t mean you just summarize each paper in chronological order; instead, you should group articles into time periods and identify what they have in common, as well as signalling important turning points or developments in the literature.
If the literature covers various different topics, you can organize it thematically .
That means that each paragraph or section focuses on a specific theme and explains how that theme is approached in the literature.
![How to Synthesize Written Information from Multiple Sources 3 synthesizing the literature using themes](https://www.simplypsychology.org/wp-content/uploads/organize-by-theme.jpg)
Source Used with Permission: The Chicago School
If you’re drawing on literature from various different fields or they use a wide variety of research methods, you can organize your sources methodologically .
That means grouping together studies based on the type of research they did and discussing the findings that emerged from each method.
If your topic involves a debate between different schools of thought, you can organize it theoretically .
That means comparing the different theories that have been developed and grouping together papers based on the position or perspective they take on the topic, as well as evaluating which arguments are most convincing.
Step 3: Write paragraphs with topic sentences
What sets a synthesis apart from a summary is that it combines various sources. The easiest way to think about this is that each paragraph should discuss a few different sources, and you should be able to condense the overall point of the paragraph into one sentence.
This is called a topic sentence , and it usually appears at the start of the paragraph. The topic sentence signals what the whole paragraph is about; every sentence in the paragraph should be clearly related to it.
A topic sentence can be a simple summary of the paragraph’s content:
“Early research on [x] focused heavily on [y].”
For an effective synthesis, you can use topic sentences to link back to the previous paragraph, highlighting a point of debate or critique:
“Several scholars have pointed out the flaws in this approach.” “While recent research has attempted to address the problem, many of these studies have methodological flaws that limit their validity.”
By using topic sentences, you can ensure that your paragraphs are coherent and clearly show the connections between the articles you are discussing.
As you write your paragraphs, avoid quoting directly from sources: use your own words to explain the commonalities and differences that you found in the literature.
Don’t try to cover every single point from every single source – the key to synthesizing is to extract the most important and relevant information and combine it to give your reader an overall picture of the state of knowledge on your topic.
Step 4: Revise, edit and proofread
Like any other piece of academic writing, synthesizing literature doesn’t happen all in one go – it involves redrafting, revising, editing and proofreading your work.
Checklist for Synthesis
- Do I introduce the paragraph with a clear, focused topic sentence?
- Do I discuss more than one source in the paragraph?
- Do I mention only the most relevant findings, rather than describing every part of the studies?
- Do I discuss the similarities or differences between the sources, rather than summarizing each source in turn?
- Do I put the findings or arguments of the sources in my own words?
- Is the paragraph organized around a single idea?
- Is the paragraph directly relevant to my research question or topic?
- Is there a logical transition from this paragraph to the next one?
Further Information
How to Synthesise: a Step-by-Step Approach
Help…I”ve Been Asked to Synthesize!
Learn how to Synthesise (combine information from sources)
How to write a Psychology Essay
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- How to Write a Literature Review | Guide, Examples, & Templates
How to Write a Literature Review | Guide, Examples, & Templates
Published on January 2, 2023 by Shona McCombes . Revised on September 11, 2023.
What is a literature review? A literature review is a survey of scholarly sources on a specific topic. It provides an overview of current knowledge, allowing you to identify relevant theories, methods, and gaps in the existing research that you can later apply to your paper, thesis, or dissertation topic .
There are five key steps to writing a literature review:
- Search for relevant literature
- Evaluate sources
- Identify themes, debates, and gaps
- Outline the structure
- Write your literature review
A good literature review doesn’t just summarize sources—it analyzes, synthesizes , and critically evaluates to give a clear picture of the state of knowledge on the subject.
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Table of contents
What is the purpose of a literature review, examples of literature reviews, step 1 – search for relevant literature, step 2 – evaluate and select sources, step 3 – identify themes, debates, and gaps, step 4 – outline your literature review’s structure, step 5 – write your literature review, free lecture slides, other interesting articles, frequently asked questions, introduction.
- Quick Run-through
- Step 1 & 2
When you write a thesis , dissertation , or research paper , you will likely have to conduct a literature review to situate your research within existing knowledge. The literature review gives you a chance to:
- Demonstrate your familiarity with the topic and its scholarly context
- Develop a theoretical framework and methodology for your research
- Position your work in relation to other researchers and theorists
- Show how your research addresses a gap or contributes to a debate
- Evaluate the current state of research and demonstrate your knowledge of the scholarly debates around your topic.
Writing literature reviews is a particularly important skill if you want to apply for graduate school or pursue a career in research. We’ve written a step-by-step guide that you can follow below.
![how do you write a synthesis for a literature review Literature review guide](https://www.scribbr.nl/wp-content/uploads/2022/04/Literature-review-guide.webp)
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Writing literature reviews can be quite challenging! A good starting point could be to look at some examples, depending on what kind of literature review you’d like to write.
- Example literature review #1: “Why Do People Migrate? A Review of the Theoretical Literature” ( Theoretical literature review about the development of economic migration theory from the 1950s to today.)
- Example literature review #2: “Literature review as a research methodology: An overview and guidelines” ( Methodological literature review about interdisciplinary knowledge acquisition and production.)
- Example literature review #3: “The Use of Technology in English Language Learning: A Literature Review” ( Thematic literature review about the effects of technology on language acquisition.)
- Example literature review #4: “Learners’ Listening Comprehension Difficulties in English Language Learning: A Literature Review” ( Chronological literature review about how the concept of listening skills has changed over time.)
You can also check out our templates with literature review examples and sample outlines at the links below.
Download Word doc Download Google doc
Before you begin searching for literature, you need a clearly defined topic .
If you are writing the literature review section of a dissertation or research paper, you will search for literature related to your research problem and questions .
Make a list of keywords
Start by creating a list of keywords related to your research question. Include each of the key concepts or variables you’re interested in, and list any synonyms and related terms. You can add to this list as you discover new keywords in the process of your literature search.
- Social media, Facebook, Instagram, Twitter, Snapchat, TikTok
- Body image, self-perception, self-esteem, mental health
- Generation Z, teenagers, adolescents, youth
Search for relevant sources
Use your keywords to begin searching for sources. Some useful databases to search for journals and articles include:
- Your university’s library catalogue
- Google Scholar
- Project Muse (humanities and social sciences)
- Medline (life sciences and biomedicine)
- EconLit (economics)
- Inspec (physics, engineering and computer science)
You can also use boolean operators to help narrow down your search.
Make sure to read the abstract to find out whether an article is relevant to your question. When you find a useful book or article, you can check the bibliography to find other relevant sources.
You likely won’t be able to read absolutely everything that has been written on your topic, so it will be necessary to evaluate which sources are most relevant to your research question.
For each publication, ask yourself:
- What question or problem is the author addressing?
- What are the key concepts and how are they defined?
- What are the key theories, models, and methods?
- Does the research use established frameworks or take an innovative approach?
- What are the results and conclusions of the study?
- How does the publication relate to other literature in the field? Does it confirm, add to, or challenge established knowledge?
- What are the strengths and weaknesses of the research?
Make sure the sources you use are credible , and make sure you read any landmark studies and major theories in your field of research.
You can use our template to summarize and evaluate sources you’re thinking about using. Click on either button below to download.
Take notes and cite your sources
As you read, you should also begin the writing process. Take notes that you can later incorporate into the text of your literature review.
It is important to keep track of your sources with citations to avoid plagiarism . It can be helpful to make an annotated bibliography , where you compile full citation information and write a paragraph of summary and analysis for each source. This helps you remember what you read and saves time later in the process.
Prevent plagiarism. Run a free check.
To begin organizing your literature review’s argument and structure, be sure you understand the connections and relationships between the sources you’ve read. Based on your reading and notes, you can look for:
- Trends and patterns (in theory, method or results): do certain approaches become more or less popular over time?
- Themes: what questions or concepts recur across the literature?
- Debates, conflicts and contradictions: where do sources disagree?
- Pivotal publications: are there any influential theories or studies that changed the direction of the field?
- Gaps: what is missing from the literature? Are there weaknesses that need to be addressed?
This step will help you work out the structure of your literature review and (if applicable) show how your own research will contribute to existing knowledge.
- Most research has focused on young women.
- There is an increasing interest in the visual aspects of social media.
- But there is still a lack of robust research on highly visual platforms like Instagram and Snapchat—this is a gap that you could address in your own research.
There are various approaches to organizing the body of a literature review. Depending on the length of your literature review, you can combine several of these strategies (for example, your overall structure might be thematic, but each theme is discussed chronologically).
Chronological
The simplest approach is to trace the development of the topic over time. However, if you choose this strategy, be careful to avoid simply listing and summarizing sources in order.
Try to analyze patterns, turning points and key debates that have shaped the direction of the field. Give your interpretation of how and why certain developments occurred.
If you have found some recurring central themes, you can organize your literature review into subsections that address different aspects of the topic.
For example, if you are reviewing literature about inequalities in migrant health outcomes, key themes might include healthcare policy, language barriers, cultural attitudes, legal status, and economic access.
Methodological
If you draw your sources from different disciplines or fields that use a variety of research methods , you might want to compare the results and conclusions that emerge from different approaches. For example:
- Look at what results have emerged in qualitative versus quantitative research
- Discuss how the topic has been approached by empirical versus theoretical scholarship
- Divide the literature into sociological, historical, and cultural sources
Theoretical
A literature review is often the foundation for a theoretical framework . You can use it to discuss various theories, models, and definitions of key concepts.
You might argue for the relevance of a specific theoretical approach, or combine various theoretical concepts to create a framework for your research.
Like any other academic text , your literature review should have an introduction , a main body, and a conclusion . What you include in each depends on the objective of your literature review.
The introduction should clearly establish the focus and purpose of the literature review.
Depending on the length of your literature review, you might want to divide the body into subsections. You can use a subheading for each theme, time period, or methodological approach.
As you write, you can follow these tips:
- Summarize and synthesize: give an overview of the main points of each source and combine them into a coherent whole
- Analyze and interpret: don’t just paraphrase other researchers — add your own interpretations where possible, discussing the significance of findings in relation to the literature as a whole
- Critically evaluate: mention the strengths and weaknesses of your sources
- Write in well-structured paragraphs: use transition words and topic sentences to draw connections, comparisons and contrasts
In the conclusion, you should summarize the key findings you have taken from the literature and emphasize their significance.
When you’ve finished writing and revising your literature review, don’t forget to proofread thoroughly before submitting. Not a language expert? Check out Scribbr’s professional proofreading services !
This article has been adapted into lecture slides that you can use to teach your students about writing a literature review.
Scribbr slides are free to use, customize, and distribute for educational purposes.
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If you want to know more about the research process , methodology , research bias , or statistics , make sure to check out some of our other articles with explanations and examples.
- Sampling methods
- Simple random sampling
- Stratified sampling
- Cluster sampling
- Likert scales
- Reproducibility
Statistics
- Null hypothesis
- Statistical power
- Probability distribution
- Effect size
- Poisson distribution
Research bias
- Optimism bias
- Cognitive bias
- Implicit bias
- Hawthorne effect
- Anchoring bias
- Explicit bias
A literature review is a survey of scholarly sources (such as books, journal articles, and theses) related to a specific topic or research question .
It is often written as part of a thesis, dissertation , or research paper , in order to situate your work in relation to existing knowledge.
There are several reasons to conduct a literature review at the beginning of a research project:
- To familiarize yourself with the current state of knowledge on your topic
- To ensure that you’re not just repeating what others have already done
- To identify gaps in knowledge and unresolved problems that your research can address
- To develop your theoretical framework and methodology
- To provide an overview of the key findings and debates on the topic
Writing the literature review shows your reader how your work relates to existing research and what new insights it will contribute.
The literature review usually comes near the beginning of your thesis or dissertation . After the introduction , it grounds your research in a scholarly field and leads directly to your theoretical framework or methodology .
A literature review is a survey of credible sources on a topic, often used in dissertations , theses, and research papers . Literature reviews give an overview of knowledge on a subject, helping you identify relevant theories and methods, as well as gaps in existing research. Literature reviews are set up similarly to other academic texts , with an introduction , a main body, and a conclusion .
An annotated bibliography is a list of source references that has a short description (called an annotation ) for each of the sources. It is often assigned as part of the research process for a paper .
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A literature review is a document or section of a document that collects key sources on a topic and discusses those sources in conversation with each other (also called synthesis ). The lit review is an important genre in many disciplines, not just literature (i.e., the study of works of literature such as novels and plays). When we say “literature review” or refer to “the literature,” we are talking about the research ( scholarship ) in a given field. You will often see the terms “the research,” “the scholarship,” and “the literature” used mostly interchangeably.
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Where, when, and why would I write a lit review?
There are a number of different situations where you might write a literature review, each with slightly different expectations; different disciplines, too, have field-specific expectations for what a literature review is and does. For instance, in the humanities, authors might include more overt argumentation and interpretation of source material in their literature reviews, whereas in the sciences, authors are more likely to report study designs and results in their literature reviews; these differences reflect these disciplines’ purposes and conventions in scholarship. You should always look at examples from your own discipline and talk to professors or mentors in your field to be sure you understand your discipline’s conventions, for literature reviews as well as for any other genre.
A literature review can be a part of a research paper or scholarly article, usually falling after the introduction and before the research methods sections. In these cases, the lit review just needs to cover scholarship that is important to the issue you are writing about; sometimes it will also cover key sources that informed your research methodology.
Lit reviews can also be standalone pieces, either as assignments in a class or as publications. In a class, a lit review may be assigned to help students familiarize themselves with a topic and with scholarship in their field, get an idea of the other researchers working on the topic they’re interested in, find gaps in existing research in order to propose new projects, and/or develop a theoretical framework and methodology for later research. As a publication, a lit review usually is meant to help make other scholars’ lives easier by collecting and summarizing, synthesizing, and analyzing existing research on a topic. This can be especially helpful for students or scholars getting into a new research area, or for directing an entire community of scholars toward questions that have not yet been answered.
What are the parts of a lit review?
Most lit reviews use a basic introduction-body-conclusion structure; if your lit review is part of a larger paper, the introduction and conclusion pieces may be just a few sentences while you focus most of your attention on the body. If your lit review is a standalone piece, the introduction and conclusion take up more space and give you a place to discuss your goals, research methods, and conclusions separately from where you discuss the literature itself.
Introduction:
- An introductory paragraph that explains what your working topic and thesis is
- A forecast of key topics or texts that will appear in the review
- Potentially, a description of how you found sources and how you analyzed them for inclusion and discussion in the review (more often found in published, standalone literature reviews than in lit review sections in an article or research paper)
- Summarize and synthesize: Give an overview of the main points of each source and combine them into a coherent whole
- Analyze and interpret: Don’t just paraphrase other researchers – add your own interpretations where possible, discussing the significance of findings in relation to the literature as a whole
- Critically Evaluate: Mention the strengths and weaknesses of your sources
- Write in well-structured paragraphs: Use transition words and topic sentence to draw connections, comparisons, and contrasts.
Conclusion:
- Summarize the key findings you have taken from the literature and emphasize their significance
- Connect it back to your primary research question
How should I organize my lit review?
Lit reviews can take many different organizational patterns depending on what you are trying to accomplish with the review. Here are some examples:
- Chronological : The simplest approach is to trace the development of the topic over time, which helps familiarize the audience with the topic (for instance if you are introducing something that is not commonly known in your field). If you choose this strategy, be careful to avoid simply listing and summarizing sources in order. Try to analyze the patterns, turning points, and key debates that have shaped the direction of the field. Give your interpretation of how and why certain developments occurred (as mentioned previously, this may not be appropriate in your discipline — check with a teacher or mentor if you’re unsure).
- Thematic : If you have found some recurring central themes that you will continue working with throughout your piece, you can organize your literature review into subsections that address different aspects of the topic. For example, if you are reviewing literature about women and religion, key themes can include the role of women in churches and the religious attitude towards women.
- Qualitative versus quantitative research
- Empirical versus theoretical scholarship
- Divide the research by sociological, historical, or cultural sources
- Theoretical : In many humanities articles, the literature review is the foundation for the theoretical framework. You can use it to discuss various theories, models, and definitions of key concepts. You can argue for the relevance of a specific theoretical approach or combine various theorical concepts to create a framework for your research.
What are some strategies or tips I can use while writing my lit review?
Any lit review is only as good as the research it discusses; make sure your sources are well-chosen and your research is thorough. Don’t be afraid to do more research if you discover a new thread as you’re writing. More info on the research process is available in our "Conducting Research" resources .
As you’re doing your research, create an annotated bibliography ( see our page on the this type of document ). Much of the information used in an annotated bibliography can be used also in a literature review, so you’ll be not only partially drafting your lit review as you research, but also developing your sense of the larger conversation going on among scholars, professionals, and any other stakeholders in your topic.
Usually you will need to synthesize research rather than just summarizing it. This means drawing connections between sources to create a picture of the scholarly conversation on a topic over time. Many student writers struggle to synthesize because they feel they don’t have anything to add to the scholars they are citing; here are some strategies to help you:
- It often helps to remember that the point of these kinds of syntheses is to show your readers how you understand your research, to help them read the rest of your paper.
- Writing teachers often say synthesis is like hosting a dinner party: imagine all your sources are together in a room, discussing your topic. What are they saying to each other?
- Look at the in-text citations in each paragraph. Are you citing just one source for each paragraph? This usually indicates summary only. When you have multiple sources cited in a paragraph, you are more likely to be synthesizing them (not always, but often
- Read more about synthesis here.
The most interesting literature reviews are often written as arguments (again, as mentioned at the beginning of the page, this is discipline-specific and doesn’t work for all situations). Often, the literature review is where you can establish your research as filling a particular gap or as relevant in a particular way. You have some chance to do this in your introduction in an article, but the literature review section gives a more extended opportunity to establish the conversation in the way you would like your readers to see it. You can choose the intellectual lineage you would like to be part of and whose definitions matter most to your thinking (mostly humanities-specific, but this goes for sciences as well). In addressing these points, you argue for your place in the conversation, which tends to make the lit review more compelling than a simple reporting of other sources.
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Chapter 7: Synthesizing Sources
Learning objectives.
At the conclusion of this chapter, you will be able to:
- synthesize key sources connecting them with the research question and topic area.
7.1 Overview of synthesizing
7.1.1 putting the pieces together.
Combining separate elements into a whole is the dictionary definition of synthesis. It is a way to make connections among and between numerous and varied source materials. A literature review is not an annotated bibliography, organized by title, author, or date of publication. Rather, it is grouped by topic to create a whole view of the literature relevant to your research question.
![how do you write a synthesis for a literature review](https://press.rebus.community/app/uploads/sites/101/2017/11/image1.jpg)
Your synthesis must demonstrate a critical analysis of the papers you collected as well as your ability to integrate the results of your analysis into your own literature review. Each paper collected should be critically evaluated and weighed for “adequacy, appropriateness, and thoroughness” ( Garrard, 2017 ) before inclusion in your own review. Papers that do not meet this criteria likely should not be included in your literature review.
Begin the synthesis process by creating a grid, table, or an outline where you will summarize, using common themes you have identified and the sources you have found. The summary grid or outline will help you compare and contrast the themes so you can see the relationships among them as well as areas where you may need to do more searching. Whichever method you choose, this type of organization will help you to both understand the information you find and structure the writing of your review. Remember, although “the means of summarizing can vary, the key at this point is to make sure you understand what you’ve found and how it relates to your topic and research question” ( Bennard et al., 2014 ).
![how do you write a synthesis for a literature review Figure 7.2 shows an example of a simplified literature summary table. In this example, individual journal citations are listed in rows. Table column headings read: purpose, methods, and results.](https://press.rebus.community/app/uploads/sites/101/2017/11/image2.png)
As you read through the material you gather, look for common themes as they may provide the structure for your literature review. And, remember, research is an iterative process: it is not unusual to go back and search information sources for more material.
At one extreme, if you are claiming, ‘There are no prior publications on this topic,’ it is more likely that you have not found them yet and may need to broaden your search. At another extreme, writing a complete literature review can be difficult with a well-trod topic. Do not cite it all; instead cite what is most relevant. If that still leaves too much to include, be sure to reference influential sources…as well as high-quality work that clearly connects to the points you make. ( Klingner, Scanlon, & Pressley, 2005 ).
7.2 Creating a summary table
Literature reviews can be organized sequentially or by topic, theme, method, results, theory, or argument. It’s important to develop categories that are meaningful and relevant to your research question. Take detailed notes on each article and use a consistent format for capturing all the information each article provides. These notes and the summary table can be done manually, using note cards. However, given the amount of information you will be recording, an electronic file created in a word processing or spreadsheet is more manageable. Examples of fields you may want to capture in your notes include:
- Authors’ names
- Article title
- Publication year
- Main purpose of the article
- Methodology or research design
- Participants
- Measurement
- Conclusions
Other fields that will be useful when you begin to synthesize the sum total of your research:
- Specific details of the article or research that are especially relevant to your study
- Key terms and definitions
- Strengths or weaknesses in research design
- Relationships to other studies
- Possible gaps in the research or literature (for example, many research articles conclude with the statement “more research is needed in this area”)
- Finally, note how closely each article relates to your topic. You may want to rank these as high, medium, or low relevance. For papers that you decide not to include, you may want to note your reasoning for exclusion, such as ‘small sample size’, ‘local case study,’ or ‘lacks evidence to support assertion.’
This short video demonstrates how a nursing researcher might create a summary table.
7.2.1 Creating a Summary Table
![how do you write a synthesis for a literature review](https://press.rebus.community/app/uploads/sites/101/2017/12/Screen-Shot-2017-12-12-at-11.02.53.png)
Summary tables can be organized by author or by theme, for example:
Author/Year | Research Design | Participants or Population Studied | Comparison | Outcome |
Smith/2010 | Mixed methods | Undergraduates | Graduates | Improved access |
King/2016 | Survey | Females | Males | Increased representation |
Miller/2011 | Content analysis | Nurses | Doctors | New procedure |
For a summary table template, see http://blogs.monm.edu/writingatmc/files/2013/04/Synthesis-Matrix-Template.pdf
7.3 Creating a summary outline
An alternate way to organize your articles for synthesis it to create an outline. After you have collected the articles you intend to use (and have put aside the ones you won’t be using), it’s time to identify the conclusions that can be drawn from the articles as a group.
Based on your review of the collected articles, group them by categories. You may wish to further organize them by topic and then chronologically or alphabetically by author. For each topic or subtopic you identified during your critical analysis of the paper, determine what those papers have in common. Likewise, determine which ones in the group differ. If there are contradictory findings, you may be able to identify methodological or theoretical differences that could account for the contradiction (for example, differences in population demographics). Determine what general conclusions you can report about the topic or subtopic as the entire group of studies relate to it. For example, you may have several studies that agree on outcome, such as ‘hands on learning is best for science in elementary school’ or that ‘continuing education is the best method for updating nursing certification.’ In that case, you may want to organize by methodology used in the studies rather than by outcome.
Organize your outline in a logical order and prepare to write the first draft of your literature review. That order might be from broad to more specific, or it may be sequential or chronological, going from foundational literature to more current. Remember, “an effective literature review need not denote the entire historical record, but rather establish the raison d’etre for the current study and in doing so cite that literature distinctly pertinent for theoretical, methodological, or empirical reasons.” ( Milardo, 2015, p. 22 ).
As you organize the summarized documents into a logical structure, you are also appraising and synthesizing complex information from multiple sources. Your literature review is the result of your research that synthesizes new and old information and creates new knowledge.
7.4 Additional resources:
Literature Reviews: Using a Matrix to Organize Research / Saint Mary’s University of Minnesota
Literature Review: Synthesizing Multiple Sources / Indiana University
Writing a Literature Review and Using a Synthesis Matrix / Florida International University
Sample Literature Reviews Grid / Complied by Lindsay Roberts
Select three or four articles on a single topic of interest to you. Then enter them into an outline or table in the categories you feel are important to a research question. Try both the grid and the outline if you can to see which suits you better. The attached grid contains the fields suggested in the video .
Literature Review Table
Author Date | Topic/Focus Purpose | Conceptual Theoretical Framework | Paradigm Methods | Context Setting Sample | Findings | Gaps |
Test Yourself
- Select two articles from your own summary table or outline and write a paragraph explaining how and why the sources relate to each other and your review of the literature.
- In your literature review, under what topic or subtopic will you place the paragraph you just wrote?
Image attribution
Literature Reviews for Education and Nursing Graduate Students Copyright © by Linda Frederiksen is licensed under a Creative Commons Attribution 4.0 International License , except where otherwise noted.
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Ten Simple Rules for Writing a Literature Review
Marco pautasso.
1 Centre for Functional and Evolutionary Ecology (CEFE), CNRS, Montpellier, France
2 Centre for Biodiversity Synthesis and Analysis (CESAB), FRB, Aix-en-Provence, France
Literature reviews are in great demand in most scientific fields. Their need stems from the ever-increasing output of scientific publications [1] . For example, compared to 1991, in 2008 three, eight, and forty times more papers were indexed in Web of Science on malaria, obesity, and biodiversity, respectively [2] . Given such mountains of papers, scientists cannot be expected to examine in detail every single new paper relevant to their interests [3] . Thus, it is both advantageous and necessary to rely on regular summaries of the recent literature. Although recognition for scientists mainly comes from primary research, timely literature reviews can lead to new synthetic insights and are often widely read [4] . For such summaries to be useful, however, they need to be compiled in a professional way [5] .
When starting from scratch, reviewing the literature can require a titanic amount of work. That is why researchers who have spent their career working on a certain research issue are in a perfect position to review that literature. Some graduate schools are now offering courses in reviewing the literature, given that most research students start their project by producing an overview of what has already been done on their research issue [6] . However, it is likely that most scientists have not thought in detail about how to approach and carry out a literature review.
Reviewing the literature requires the ability to juggle multiple tasks, from finding and evaluating relevant material to synthesising information from various sources, from critical thinking to paraphrasing, evaluating, and citation skills [7] . In this contribution, I share ten simple rules I learned working on about 25 literature reviews as a PhD and postdoctoral student. Ideas and insights also come from discussions with coauthors and colleagues, as well as feedback from reviewers and editors.
Rule 1: Define a Topic and Audience
How to choose which topic to review? There are so many issues in contemporary science that you could spend a lifetime of attending conferences and reading the literature just pondering what to review. On the one hand, if you take several years to choose, several other people may have had the same idea in the meantime. On the other hand, only a well-considered topic is likely to lead to a brilliant literature review [8] . The topic must at least be:
- interesting to you (ideally, you should have come across a series of recent papers related to your line of work that call for a critical summary),
- an important aspect of the field (so that many readers will be interested in the review and there will be enough material to write it), and
- a well-defined issue (otherwise you could potentially include thousands of publications, which would make the review unhelpful).
Ideas for potential reviews may come from papers providing lists of key research questions to be answered [9] , but also from serendipitous moments during desultory reading and discussions. In addition to choosing your topic, you should also select a target audience. In many cases, the topic (e.g., web services in computational biology) will automatically define an audience (e.g., computational biologists), but that same topic may also be of interest to neighbouring fields (e.g., computer science, biology, etc.).
Rule 2: Search and Re-search the Literature
After having chosen your topic and audience, start by checking the literature and downloading relevant papers. Five pieces of advice here:
- keep track of the search items you use (so that your search can be replicated [10] ),
- keep a list of papers whose pdfs you cannot access immediately (so as to retrieve them later with alternative strategies),
- use a paper management system (e.g., Mendeley, Papers, Qiqqa, Sente),
- define early in the process some criteria for exclusion of irrelevant papers (these criteria can then be described in the review to help define its scope), and
- do not just look for research papers in the area you wish to review, but also seek previous reviews.
The chances are high that someone will already have published a literature review ( Figure 1 ), if not exactly on the issue you are planning to tackle, at least on a related topic. If there are already a few or several reviews of the literature on your issue, my advice is not to give up, but to carry on with your own literature review,
![Click on image to zoom An external file that holds a picture, illustration, etc.
Object name is pcbi.1003149.g001.jpg](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3715443/bin/pcbi.1003149.g001.jpg)
The bottom-right situation (many literature reviews but few research papers) is not just a theoretical situation; it applies, for example, to the study of the impacts of climate change on plant diseases, where there appear to be more literature reviews than research studies [33] .
- discussing in your review the approaches, limitations, and conclusions of past reviews,
- trying to find a new angle that has not been covered adequately in the previous reviews, and
- incorporating new material that has inevitably accumulated since their appearance.
When searching the literature for pertinent papers and reviews, the usual rules apply:
- be thorough,
- use different keywords and database sources (e.g., DBLP, Google Scholar, ISI Proceedings, JSTOR Search, Medline, Scopus, Web of Science), and
- look at who has cited past relevant papers and book chapters.
Rule 3: Take Notes While Reading
If you read the papers first, and only afterwards start writing the review, you will need a very good memory to remember who wrote what, and what your impressions and associations were while reading each single paper. My advice is, while reading, to start writing down interesting pieces of information, insights about how to organize the review, and thoughts on what to write. This way, by the time you have read the literature you selected, you will already have a rough draft of the review.
Of course, this draft will still need much rewriting, restructuring, and rethinking to obtain a text with a coherent argument [11] , but you will have avoided the danger posed by staring at a blank document. Be careful when taking notes to use quotation marks if you are provisionally copying verbatim from the literature. It is advisable then to reformulate such quotes with your own words in the final draft. It is important to be careful in noting the references already at this stage, so as to avoid misattributions. Using referencing software from the very beginning of your endeavour will save you time.
Rule 4: Choose the Type of Review You Wish to Write
After having taken notes while reading the literature, you will have a rough idea of the amount of material available for the review. This is probably a good time to decide whether to go for a mini- or a full review. Some journals are now favouring the publication of rather short reviews focusing on the last few years, with a limit on the number of words and citations. A mini-review is not necessarily a minor review: it may well attract more attention from busy readers, although it will inevitably simplify some issues and leave out some relevant material due to space limitations. A full review will have the advantage of more freedom to cover in detail the complexities of a particular scientific development, but may then be left in the pile of the very important papers “to be read” by readers with little time to spare for major monographs.
There is probably a continuum between mini- and full reviews. The same point applies to the dichotomy of descriptive vs. integrative reviews. While descriptive reviews focus on the methodology, findings, and interpretation of each reviewed study, integrative reviews attempt to find common ideas and concepts from the reviewed material [12] . A similar distinction exists between narrative and systematic reviews: while narrative reviews are qualitative, systematic reviews attempt to test a hypothesis based on the published evidence, which is gathered using a predefined protocol to reduce bias [13] , [14] . When systematic reviews analyse quantitative results in a quantitative way, they become meta-analyses. The choice between different review types will have to be made on a case-by-case basis, depending not just on the nature of the material found and the preferences of the target journal(s), but also on the time available to write the review and the number of coauthors [15] .
Rule 5: Keep the Review Focused, but Make It of Broad Interest
Whether your plan is to write a mini- or a full review, it is good advice to keep it focused 16 , 17 . Including material just for the sake of it can easily lead to reviews that are trying to do too many things at once. The need to keep a review focused can be problematic for interdisciplinary reviews, where the aim is to bridge the gap between fields [18] . If you are writing a review on, for example, how epidemiological approaches are used in modelling the spread of ideas, you may be inclined to include material from both parent fields, epidemiology and the study of cultural diffusion. This may be necessary to some extent, but in this case a focused review would only deal in detail with those studies at the interface between epidemiology and the spread of ideas.
While focus is an important feature of a successful review, this requirement has to be balanced with the need to make the review relevant to a broad audience. This square may be circled by discussing the wider implications of the reviewed topic for other disciplines.
Rule 6: Be Critical and Consistent
Reviewing the literature is not stamp collecting. A good review does not just summarize the literature, but discusses it critically, identifies methodological problems, and points out research gaps [19] . After having read a review of the literature, a reader should have a rough idea of:
- the major achievements in the reviewed field,
- the main areas of debate, and
- the outstanding research questions.
It is challenging to achieve a successful review on all these fronts. A solution can be to involve a set of complementary coauthors: some people are excellent at mapping what has been achieved, some others are very good at identifying dark clouds on the horizon, and some have instead a knack at predicting where solutions are going to come from. If your journal club has exactly this sort of team, then you should definitely write a review of the literature! In addition to critical thinking, a literature review needs consistency, for example in the choice of passive vs. active voice and present vs. past tense.
Rule 7: Find a Logical Structure
Like a well-baked cake, a good review has a number of telling features: it is worth the reader's time, timely, systematic, well written, focused, and critical. It also needs a good structure. With reviews, the usual subdivision of research papers into introduction, methods, results, and discussion does not work or is rarely used. However, a general introduction of the context and, toward the end, a recapitulation of the main points covered and take-home messages make sense also in the case of reviews. For systematic reviews, there is a trend towards including information about how the literature was searched (database, keywords, time limits) [20] .
How can you organize the flow of the main body of the review so that the reader will be drawn into and guided through it? It is generally helpful to draw a conceptual scheme of the review, e.g., with mind-mapping techniques. Such diagrams can help recognize a logical way to order and link the various sections of a review [21] . This is the case not just at the writing stage, but also for readers if the diagram is included in the review as a figure. A careful selection of diagrams and figures relevant to the reviewed topic can be very helpful to structure the text too [22] .
Rule 8: Make Use of Feedback
Reviews of the literature are normally peer-reviewed in the same way as research papers, and rightly so [23] . As a rule, incorporating feedback from reviewers greatly helps improve a review draft. Having read the review with a fresh mind, reviewers may spot inaccuracies, inconsistencies, and ambiguities that had not been noticed by the writers due to rereading the typescript too many times. It is however advisable to reread the draft one more time before submission, as a last-minute correction of typos, leaps, and muddled sentences may enable the reviewers to focus on providing advice on the content rather than the form.
Feedback is vital to writing a good review, and should be sought from a variety of colleagues, so as to obtain a diversity of views on the draft. This may lead in some cases to conflicting views on the merits of the paper, and on how to improve it, but such a situation is better than the absence of feedback. A diversity of feedback perspectives on a literature review can help identify where the consensus view stands in the landscape of the current scientific understanding of an issue [24] .
Rule 9: Include Your Own Relevant Research, but Be Objective
In many cases, reviewers of the literature will have published studies relevant to the review they are writing. This could create a conflict of interest: how can reviewers report objectively on their own work [25] ? Some scientists may be overly enthusiastic about what they have published, and thus risk giving too much importance to their own findings in the review. However, bias could also occur in the other direction: some scientists may be unduly dismissive of their own achievements, so that they will tend to downplay their contribution (if any) to a field when reviewing it.
In general, a review of the literature should neither be a public relations brochure nor an exercise in competitive self-denial. If a reviewer is up to the job of producing a well-organized and methodical review, which flows well and provides a service to the readership, then it should be possible to be objective in reviewing one's own relevant findings. In reviews written by multiple authors, this may be achieved by assigning the review of the results of a coauthor to different coauthors.
Rule 10: Be Up-to-Date, but Do Not Forget Older Studies
Given the progressive acceleration in the publication of scientific papers, today's reviews of the literature need awareness not just of the overall direction and achievements of a field of inquiry, but also of the latest studies, so as not to become out-of-date before they have been published. Ideally, a literature review should not identify as a major research gap an issue that has just been addressed in a series of papers in press (the same applies, of course, to older, overlooked studies (“sleeping beauties” [26] )). This implies that literature reviewers would do well to keep an eye on electronic lists of papers in press, given that it can take months before these appear in scientific databases. Some reviews declare that they have scanned the literature up to a certain point in time, but given that peer review can be a rather lengthy process, a full search for newly appeared literature at the revision stage may be worthwhile. Assessing the contribution of papers that have just appeared is particularly challenging, because there is little perspective with which to gauge their significance and impact on further research and society.
Inevitably, new papers on the reviewed topic (including independently written literature reviews) will appear from all quarters after the review has been published, so that there may soon be the need for an updated review. But this is the nature of science [27] – [32] . I wish everybody good luck with writing a review of the literature.
Acknowledgments
Many thanks to M. Barbosa, K. Dehnen-Schmutz, T. Döring, D. Fontaneto, M. Garbelotto, O. Holdenrieder, M. Jeger, D. Lonsdale, A. MacLeod, P. Mills, M. Moslonka-Lefebvre, G. Stancanelli, P. Weisberg, and X. Xu for insights and discussions, and to P. Bourne, T. Matoni, and D. Smith for helpful comments on a previous draft.
Funding Statement
This work was funded by the French Foundation for Research on Biodiversity (FRB) through its Centre for Synthesis and Analysis of Biodiversity data (CESAB), as part of the NETSEED research project. The funders had no role in the preparation of the manuscript.
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What is a literature review?
A literature review is an integrated analysis -- not just a summary-- of scholarly writings and other relevant evidence related directly to your research question. That is, it represents a synthesis of the evidence that provides background information on your topic and shows a association between the evidence and your research question.
A literature review may be a stand alone work or the introduction to a larger research paper, depending on the assignment. Rely heavily on the guidelines your instructor has given you.
Why is it important?
A literature review is important because it:
- Explains the background of research on a topic.
- Demonstrates why a topic is significant to a subject area.
- Discovers relationships between research studies/ideas.
- Identifies major themes, concepts, and researchers on a topic.
- Identifies critical gaps and points of disagreement.
- Discusses further research questions that logically come out of the previous studies.
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1. Choose a topic. Define your research question.
Your literature review should be guided by your central research question. The literature represents background and research developments related to a specific research question, interpreted and analyzed by you in a synthesized way.
- Make sure your research question is not too broad or too narrow. Is it manageable?
- Begin writing down terms that are related to your question. These will be useful for searches later.
- If you have the opportunity, discuss your topic with your professor and your class mates.
2. Decide on the scope of your review
How many studies do you need to look at? How comprehensive should it be? How many years should it cover?
- This may depend on your assignment. How many sources does the assignment require?
3. Select the databases you will use to conduct your searches.
Make a list of the databases you will search.
Where to find databases:
- use the tabs on this guide
- Find other databases in the Nursing Information Resources web page
- More on the Medical Library web page
- ... and more on the Yale University Library web page
4. Conduct your searches to find the evidence. Keep track of your searches.
- Use the key words in your question, as well as synonyms for those words, as terms in your search. Use the database tutorials for help.
- Save the searches in the databases. This saves time when you want to redo, or modify, the searches. It is also helpful to use as a guide is the searches are not finding any useful results.
- Review the abstracts of research studies carefully. This will save you time.
- Use the bibliographies and references of research studies you find to locate others.
- Check with your professor, or a subject expert in the field, if you are missing any key works in the field.
- Ask your librarian for help at any time.
- Use a citation manager, such as EndNote as the repository for your citations. See the EndNote tutorials for help.
Review the literature
Some questions to help you analyze the research:
- What was the research question of the study you are reviewing? What were the authors trying to discover?
- Was the research funded by a source that could influence the findings?
- What were the research methodologies? Analyze its literature review, the samples and variables used, the results, and the conclusions.
- Does the research seem to be complete? Could it have been conducted more soundly? What further questions does it raise?
- If there are conflicting studies, why do you think that is?
- How are the authors viewed in the field? Has this study been cited? If so, how has it been analyzed?
Tips:
- Review the abstracts carefully.
- Keep careful notes so that you may track your thought processes during the research process.
- Create a matrix of the studies for easy analysis, and synthesis, across all of the studies.
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A synthesis matrix visually represents your research by organizing your sources by themes:
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How to write a PhD literature review WITHOUT using AI (Part 1: Understanding the literature)
- by James Hayton, PhD
- August 26th, 2024
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Should you do a phd, the risks of using ai to write your literature review.
There are countless videos online showing you how to use AI to write your literature review. All of them make it look easy, but all of the ones I’ve seen get fundamental things wrong. And the problem, as with a lot of bad advice, is that it will seem to work at first, but cause major, or even irreparable damage later.
The danger is that AI can help you produce something that looks like a literature review, on a topic you don’t understand. To the uninformed reader it might look impressive, but there won’t be any real insight into the topic. It will probably also contain serious mistakes that you might not notice if you don’t have the expertise.
As I’ve said before, anything you submit as your own work, you have to be able to defend . If you have a lazy examiner who doesn’t read your thesis you might be OK, but a good examiner will quite quickly figure out that you’ve used AI. They will find the parts where you don’t understand what you’ve submitted as your work, and they will, quite rightly, give you a very hard time. And if they discover that you didn’t write major sections of your own thesis, you will fail.
Can AI be used to help you write a literature review?
Can AI be used ethically and effectively? Yes, probably, but if you use it, don’t be dependent on it. You should treat it like an enthusiastic but slightly incompetent intern 1 , in that you can get it to do some work, but you need to check everything it’s done. And while it might make suggestions, never let it make decisions for you.
And if you don’t know enough about a topic to judge what AI is doing, you’ve got to fix that.
You don’t HAVE to use AI for your literature review
I started my PhD in 2003, which means I’m closer to the generation that searched the literature by going to the library 2 and reading physical, printed copies of journals than I am to the current generation with all the AI tools. But despite the advances in technology over the last 21 years, the fundamentals have not changed; you still need a good knowledge and understanding of the literature to be able to write about it.
And isn’t that the point? Surely you want to develop your expertise. You want to know the literature and have some insight of your own, rather than following a chatGPT-generated template. And surely you want to develop your own skills, so you can write with confidence without being dependent on an AI platform.
So here’s how to write a literature review without using AI. It might be slower, especially in the beginning, but you’ll be much stronger for having done the heavy lifting yourself. For now, I’m going to assume that you have some idea what you want to study, but if you want to know how to find, or rather develop, a research topic then leave a comment below and I’ll cover it in a separate video.
Never write about literature you don’t understand
So I’m going to start with a fundamental rule, and that is to never write anything that you don’t understand yourself.
Some people will tell you to take each paper you read and write a summary paragraph, then edit all those paragraphs together, but this is a terrible idea. It’s a terrible idea because when you first start reading, you don’t know how an individual paper fits into the broader context and there might be concepts that you don’t yet understand. You also might not be able to tell if the paper is any good, because not all published papers are.
This is one of the many basic, basic things that the AI advocates fail to acknowledge: a lot of published papers are just bad. So even if you trust the AI platform, which you shouldn’t, you can’t always trust the literature that it’s summarizing.
And if you follow the standard advice of writing these summary paragraphs, or taking key points and then paraphrasing them, without understanding them, you’ll fill pages with content that looks like a literature review, but you will know that you don’t understand what you’re writing about. iAnd if you have any kind of impostor syndrome, this approach is just going to make it worse.
So we have to build some knowledge and understanding of the literature before we can write about it with any confidence. This means forgetting about writing, at least initially, and taking some time to just read.
How to build your knowledge of the academic literature
I can’t give you an exact, step by step process here., because it will vary depending on your situation, your current level of knowledge, the state of your field and what you need to find out. If you want a process that you can just follow from start to finish without thinking or using your own judgement, it doesn’t exist (whether you use AI or not).
But there are general principles you can follow and adapt as your needs change over time. Generally speaking, there are different levels of knowledge you need to develop.
Start with the general trends
Let’s start with the broad picture: This is an understanding of the trends and debates and the kinds of problems people are working on. So we’re not too worried about the details of individual papers here, because initially we’re just getting a low-resolution picture of the field.
And you can usually do this fairly quickly. If you take a handful of recent papers on a specific topic and just read the introductions, you’ll probably notice that they all say similar things about the current state of the field. They will mention the same problems or ongoing debates, they’ll mention many of the same concepts, and they’ll refer to the same key papers.
For example, one of my projects involved looking at silicon nanoparticle luminescence. Basically getting silicon to give off light. Every single paper said the same thing in the introduction; that there had been a surprise result, others had reproduced it but nobody knew the underlying mechanism, and if we could figure it out then there was huge technological potential. There was a lot of heavy technical detail behind it and there were many different experiments and proposed theoretical explanations, but the basic story is easy to understand.
The key paper that everybody referenced was by Canham 3 , a name I still remember two decades later, even though I haven’t looked at the topic since. I don’t remember all the others, but I remember that one. This brings us to the next key point.
Identify the key, influential papers
Not all the literature is of equal value . Most papers have very little impact on the field, but there will be a few that have a disproportionate impact, perhaps because they made some major discovery or invented a new technique or developed a new theory. These get cited far more than anything else.
If everybody else is referring to these people, you need to know who they are and what they did that was so important. And this brings us to the next rule.
Always go back to the original source
Always go back to the original source and check what they actually did and said , because when somebody else summarizes a paper, unless they quote directly, there’s always a subtle change. In some cases, the secondary source explains the concept better, but I’ve seen so many instances where they get it wrong and then other people have cited the secondary source.
So it’s always a good idea to go back to those key original sources and try to understand;
- What problem they addressed
- What they did that was new
- What influence this had on the field
Although it’s important to take some time to try to understand these sources, you maybe don’t need to get too lost in the detail, because you can always come back to these sources multiple times throughout your PhD. And if you come back to a paper a few months or years later, after reading a lot more, after conducting some of your own research, you might have a very different understanding of it.
You should read sources multiple times
A quick side-note here: Years ago, I saw a professor on twitter saying that they “only ever read anything once”. I wish I had saved it because it was such a perfect example of the kind of misleading bullshit you see online, from people who really should know better. Any professor who says they only ever read anything once is either a genius, is lying, or is really bad at their job. Y ou can and should come back to the most important sources and read them multiple times , because your perspective on them will change as your expertise grows.
Learning the basics
As you build this initial picture of the field, the general trends and debates and the key influential figures, you will, inevitably, come across concepts, theories and techniques that you don’t understand. It’s worth taking some time to try to understand some of these.
You need to be selective and prioritize here to avoid getting overwhelmed. Part of this is accepting that you can’t know everything and there will always be gaps in your knowledge. This can be a little scary as you’ve probably come through an education system where you’re graded based on how much of the syllabus you know, but at PhD level we have to let go of that way of thinking because the amount of literature and knowledge is endless.
You’ll never know everything, but you can identify some key concepts that you need to understand for your project.
Know the most common research and analytical techniques
One of the most important aspects here, that’s often overlooked, is developing an understanding of common research and analytical techniques . This is crucial, not only for your own research, but to understand and assess the literature you read.
So many videos I’ve seen about literature reviews just take what the paper says without any critical thought. But you need be able to look at how they conducted their research and reached their conclusions…
It takes time to build this knowledge, so again it’s important to be selective, either based on the kind of research you want to do, or the most common techniques used in the field.
Find good, authoritative sources you can refer back to
It might be worth finding good, authoritative sources on specific techniques. So if you’re doing IPA, for example, get a copy of the book by Smith, Flowers and Larkin . Again, you don’t need get lost in all the detail, but you can get an initial understanding of the basic principles, and then keep going back to that source whenever you need to.
Investing time in that kind of basic understanding will then make it possible to understand the papers that use them.
Highly relevant papers for your specific project
And then, finally, we have specific papers that are highly relevant to your own study. These might be papers that look at the same problem, but from a different perspective, or perhaps serve as a foundation for part of your research. There will probably be a relatively small number of these, but you’ll need to know them really well.
Quick summary of the different levels of knowledge of the literature
To recap, as a foundation, you need
- A basic knowledge of the general trends, problems and debates in your field. You can get this from the introductions of a few papers, or from a good published literature review.
- To know the big, influential papers and what they did that was so important
- To understand the most important concepts and the most commonly used techniques
- To know the most relevant literature for your specific project
And for all of these, you should build up a collection of key, high quality sources that you can go back to whenever you need .
The key word here is quality, because it’s not about the number of papers in your bibliography, but the standard of the sources you rely upon. If you understand even a handful of important papers, it’s far better than having extensive notes or summaries of hundreds of papers that you don’t understand.
Getting into the details
With that strong foundation, you can start to look in more detail at the literature around specific issues of interest, depending on what you need at any given time.
The way you should approach this depends on what you’re trying to do. If need to do a systematic review, then maybe you need to follow PRISMA guidelines . But maybe you’re looking for a solution to a specific problem, or different methods that have been used to measure something, or for the latest, cutting edge results.
To find these, you might need to follow a more organic process, trying out different keyword searches or chasing up references in the bibliographies of papers, or just talking to people , because universities are full of people with useful expertise.
The hard work of searching the literature
However you approach it, there will be dead ends and you will have to sort through a lot of papers that aren’t useful to you (or maybe aren’t useful to you right now), but that’s the nature of academic research.
You might be able to supplement this process using AI, but you cannot delegate the process to AI. You need the ability and the patience to search and filter the literature yourself. It is a fundamental skill that you must have. It’s slow and sometimes frustrating, especially at the start, but you’ll get better and better at filtering through the literature to find the best and most relevant sources as your knowledge grows.
Coming up in part 2: How to write you literature review
In part 2 I’ll talk about how to turn your knowledge of the literature into a written literature review. But if you have any questions about this video please leave a comment below, because I have skipped over some points quite quickly, and if you’d like to know when I publish part 2, please subscribe to email updates so I can let you know directly when it’s available.
And if you’ve found this video useful, please take a moment to share it with somebody who needs it.
The best literature review the world has ever seen
This video on the same topic by Writer Science
- I stole the AI-as-an-intern analogy from Kevin Kelly in his interview on the Tim Ferris podcast ↩︎
- Google scholar was launched in November 2004 , just over a year after I started my PhD. I mostly used Web of Knowledge throughout my PhD (launched in 1997) ↩︎
- L. T. Canham. Silicon quantum wire array fabrication by electrochemical and chemical dissolution of wafers. Applied Physics Letters, 57(10):1046–1048, 1990 (Cited over 7000 times as of August 2024) ↩︎
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PhD: An uncommon guide to research, writing & PhD life
By james hayton (2015).
PhD: an uncommon guide to research, writing & PhD life is your essential guide to the basic principles every PhD student needs to know.
Applicable to virtually any field of study, it covers everything from finding a research topic, getting to grips with the literature, planning and executing research and coping with the inevitable problems that arise, through to writing, submitting and successfully defending your thesis.
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All the text on this site (and every word of every video script) is written by me, personally, because I enjoy writing. I enjoy the challenges of thinking deeply and finding the right words to express my ideas. I do not advocate for the use of AI in academic research and writing, except for very limited use cases.
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How to Write a Synthesis Essay With PDF Download
To write a synthesis essay, you need to have great coordination skills. You will need it to link various sources and research outcomes together while deriving and building on your thesis statement.
![how do you write a synthesis for a literature review Fredrick Eghosa](https://cdn.feather.blog?src=https%3A%2F%2Fwww.notion.so%2Fimage%2Fhttps%3A%252F%252Fprod-files-secure.s3.us-west-2.amazonaws.com%252F2027d774-bdda-4b65-a60b-c46bd75ee318%252F5324a077-3325-4265-a0ff-a982f4aa000d%252FFred_Passport_Pic.jpeg%3Ftable%3Dblock%26id%3D7bea6cb5-972e-4eb6-b155-063188e5f018%26cache%3Dv2&optimizer=image&quality=80&width=280)
Fredrick Eghosa
Aug 26, 2024
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Table of Contents
Key takeaways
What is a synthesis essay, components of a synthesis essay, the difference between a synthesis essay and an argumentative essay, different types of synthesis essays, how to write a synthesis essay step-by-step with examples, steps to write a synthetic essay, how to use ai to write a synthesis essay.
![how do you write a synthesis for a literature review Fredrick Eghosa](https://cdn.feather.blog?src=https%3A%2F%2Fusenotioncms.com%2Fproxy-prod%2Fblock%2F7bea6cb5-972e-4eb6-b155-063188e5f018%2F2027d774-bdda-4b65-a60b-c46bd75ee318%2F5324a077-3325-4265-a0ff-a982f4aa000d%2FFred_Passport_Pic.jpeg&optimizer=image&quality=80&width=280)
- A synthesis essay involves analyzing various sources and combining them to create a cohesive and well-supported argument. It is more than just summarizing; it requires blending information to reveal new insights.
- The key components of a synthesis essay are:
- Synthesis essays combine multiple viewpoints to create a new viewpoint whereas argumentative essays focus on rebuttal.
- AI tools like Cowriter.ai can assist with research, summarizing sources, drafting, paraphrasing, editing, and managing citations, making the essay-writing process more efficient.
- Use a provocative question, a jarring fact, a relevant quote, or statistics to make your readers interested in what you have to say.
- A smart writing assistant like Cowriter.ai makes writing hooks so fun and simple. All you need to do is input the topic and nudge it in the direction you desire, depending on whether you want your hook to be a provocative question or a jarring fact.
- Introduction
- The body of the essay is divided into paragraphs for each point. (Combine information from different sources within each paragraph to support the point. Note that you can improve your essay by using transition words to show how the sources connect to each other and to your thesis.)
- Conclusion: Summarize your main points and restate your thesis in a new way. Explain why this synthesis is important or what it shows about the topic.
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Communication challenges for people with chronic aphasia: a systematic qualitative review of barriers and facilitators in local services.
![how do you write a synthesis for a literature review how do you write a synthesis for a literature review](https://www.mdpi.com/bundles/mdpisciprofileslink/img/unknown-user.png)
1. Introduction
2.1. search process, 2.2. data extraction and analysis, 3.1. study selection, 3.2. study characteristics, 3.3. methodological quality ratings, 3.4. reported barriers and facilitators, 4. discussion, 4.1. barriers and facilitators, 4.2. what can be done to catalyze the communicational participation of people with aphasia, 5. conclusions, limitations, author contributions, institutional review board statement, informed consent statement, data availability statement, conflicts of interest.
No. | Item | Guide and Description | Location (Lines) |
---|---|---|---|
1 | Aim | State the research question the synthesis addresses. | 100 |
2 | Synthesis methodology | Identify the synthesis methodology or theoretical framework that underpins the synthesis, and describe the rationale for the choice of methodology. | 140–151 |
3 | Approach to searching | Indicate whether the search was pre-planned or iterative. | 109 |
4 | Inclusion criteria | Specify the inclusion/exclusion criteria. | 109–115 |
5 | Data sources | Describe the informational sources used, grey literature databases, relevant organisational websites, experts, information specialists, generic web searches, hand searching, reference lists) and when the searches were conducted; provide the rationale for using the data sources. | 105–108 |
6 | Electronic search strategy | Describe the literature search. | 116–118 |
7 | Study screening methods | Describe the process of study screening and sifting. | 118–123 |
8 | Study characteristics | Present the characteristics of the included studies. | 166–174 |
9 | Study selection results | Identify the number of studies screened and provide reasons for study exclusion. | 158–161 |
10 | Rationale for appraisal | Describe the rationale and approach used to appraise the included studies or selected findings. | 123–126 |
11 | Appraisal items | State the tools, frameworks, and criteria used to appraise the studies or selected findings. | 124–129 |
12 | Appraisal process | Indicate whether the appraisal was conducted independently by more than one reviewer and if consensus was required. | 127–129 |
13 | Appraisal results | Present the results of the quality assessment and indicate which articles, if any, were weighted/excluded based on the assessment and give the rationale. | 176–180, |
14 | Data extraction | Indicate which sections of the primary studies were analyzed and how the data were extracted from the primary studies. | 131–139 |
15 | Software | State the computer software used, if any. | No software used for analysis |
16 | Number of reviewers | Identify who was involved in coding and analysis. | 132–133 |
17 | Coding | Describe the process of the coding of data. | 140–151 |
18 | Study comparison | Describe how comparisons were made within and across studies. | 140–151 |
19 | Derivation of themes | Explain whether the process of deriving the themes or constructs was inductive or deductive. | 140–151 |
20 | Quotations | Provide quotations from the primary studies to illustrate themes/constructs and identify whether the quotations were participant quotations or the author’s interpretation. | and |
21 | Synthesis output | Present rich, compelling, and useful results that go beyond a summary of the primary studies. | and , |
Database | Keywords | Results | |
---|---|---|---|
Google Scholar | aphasi *|”aphasic person”|”language disorder”|”communication disorder”|”communication impairment” accessib *|”accessible communication”|”communication access”|”access program”|”access measure”|”universal access”|”universal design *”|”assistive technolog *”|”architectur * access *”|adapt *|signage|”social participation”|accommodat *|independen *|”inclusive society”|inclusi *|barriers|facilitators “public facilit *”|”public space *”|”financial institution *”|store *|shop *|museum *|transportation|restaurant * | 200 first results | |
CINAHL | In title and in abstract: (aphasi * OR (“language disorders” or “language impairment” or “specific language disorder”) OR “communicati * impairment” OR “acquired language disorder”) AND (accessib * OR communicati * N3 access * OR access * N3 program OR access * N3 measure OR universal access OR universal design OR assistive technolog * OR accomodations OR (barriers or obstacles or challenges) OR facilitators) AND (public facilit * OR public space OR communit * N3 participation OR social N3 participation) Criteria: All adults | 21 | |
MEDLINE | Searched via Ovid | In title and abstract: (aphasi * or language disorders or language impairment or specific language disorder or communicati * impairment or acquired language disorder) AND (accessib * or (communicati * adj3 access *) or (access * adj3 program) or (access * adj3 measure) or accomodations or barriers or obstacles or facilitators) AND (public facilit * or public space or (communit * adj3 participation) or (social adj3 participation)) | 10 |
PsycINFO | 22 | ||
ERIC | 1 | ||
Web of Science | (aphasi * OR “language disorders” OR “language impairment” OR “specific language disorder” OR “acquired language disorder” OR “communicati * impairment”) AND (accessib * OR “communicati * access *” OR “access * program” OR “access * measure” OR “universal access” OR “universal design” OR “assistive technolog *” OR accomodations OR barriers or obstacles or challenges OR facilitators) AND (“public facilit *” OR “public space” OR “communit * participation” OR “social participation”) Document types: Articles | 57 | |
Manually added references | 3 | ||
Total number of references | 314 | ||
Number of screened references (duplicates removed) | 269 |
Criterion | Ref. No. | ||||||||
---|---|---|---|---|---|---|---|---|---|
[ ] | [ ] | [ ] | [ ] | [ ] | [ ] | [ ] | [ ] | [ ] | |
Question/objective sufficiently described? | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
Study design evident and appropriate? | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 |
Context for the study clear? | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 |
Connection to a theoretical framework/wider body of knowledge? | 1 | 2 | 2 | 2 | 0 | 2 | 0 | 1 | 2 |
Described sampling strategy relevant and justified? | 1 | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 2 |
Data collection methods clearly described and systematic? | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
Data analysis clearly described and systematic? | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
Use of verification procedure(s) to establish credibility? | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
Conclusion supported by the results? | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 |
Reflexivity of the account? | 2 | 2 | 2 | 2 | 2 | 0 | 2 | 2 | 2 |
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Click here to enlarge figure
Contextual Factors | Contextual Factor Category | Factor Subtype |
---|---|---|
Environmental factors | Societal factors | Societal knowledge |
Services | ||
Policies (e.g., municipal, governmental) | ||
Procedures | ||
Task characteristics (e.g., requiring writing) | ||
Financial matters | ||
Transportation | ||
Service characteristics | ||
Attitudinal factors | Other people’s actions | |
Other people’s attitudes | ||
Other people’s knowledge | ||
Other people’s characteristics | ||
Other people’s roles (e.g., caregiver) | ||
Animals (i.e., presence of animals in the immediate environment) | ||
Physical factors | Objects’ characteristics | |
Objects (e.g., phones) | ||
Acoustic characteristics | ||
Visual characteristics | ||
Spatial characteristics | ||
Physical environment characteristics (e.g., familiarity of the environment) | ||
Personal factors | Undefined | Undefined |
Ref. No. | Authors (Year) | Country | Accessibility Context | People with Aphasia | Data Collection Strategy | Methodological Quality [ ] |
---|---|---|---|---|---|---|
[ ] | Kim et al. (2023) | Canada | Local businesses | 9 | Interviews | 18/20 |
[ ] | Taylor et al. (2021) | Australia | Local businesses | 1 | Interview | 20/20 |
[ ] | Dalemans et al. (2010) | Netherlands | Local businesses | 13 | Interviews | 20/20 |
[ ] | Howe et al. (2008a) | Australia | Local businesses, public transportation | 25 | Interviews | 20/20 |
[ ] | Blonski et al. (2014) | Canada | Community centre with exercise programs | 10 | Interviews | 18/20 |
[ ] | Ashton et al. (2008) | Australia | Public transportation | 7 | Interviews and, observation | 17/20 |
[ ] | Anglade et al. (2019) | Canada | Local businesses | 6 | Observation | 15/20 |
[ ] | Howe et al. (2008b) | Australia | Local businesses | 10 | Observation | 19/20 |
[ ] | Le Dorze et al. (2014) | Canada | Local businesses | 17 | Discussion groups | 20/20 |
Category of Contextual Factors | Factor Subtype | Barriers | Facilitators |
---|---|---|---|
Societal factors | Societal knowledge | , , ]: ] , ] ]“The physical things… seem to get so many stories [in the media], but you hardly ever hear anything about… the brain people.” [ ] | ] ]“Understanding… Education about aphasia is the most important one.” [ ] |
Services | ]“Finished my speech therapy… devastated at home ‘cause… I didn’t know what to do from here.” [ ] | , ] ] ] ] , ] | |
Policies | ] | ] | |
Procedures | , , ] , , , ] ] | ] , ] ] | |
Task characteristics | ] ] | ] | |
Financial matters | ] | ] ] | |
Transportation | ] ] | ||
Attitudinal factors | Other people’s actions | , , ]; ]; , ]; , ]; ] , , , , ]“Just take time right. Just let me think right.” [ ] | , , , , , , ]; , ]; , , ] ] ] |
Other people’s attitudes | , , ]: , , ]“Treat you as if I’m stupid,” “Impatience… Number one [barrier],” “Doesn’t give you any respect” [ , , , , , ] | ] , , , , , , ]“Light-hearted attitude… makes you relax more.” [ ] | |
Other people’s knowledge | , , , , ]: ] | , , ]“Got to the situation where he knew that what I said wasn’t really what I meant.” [ ] | |
Other people’s characteristics | ] | , , ] | |
Other people’s roles | ]: ] | , , , , ] ] | |
Animals | ] | ||
Physical factors | Objects’ characteristics | , , ] ] ] | , ] |
Objects | ] | , ] , , ] | |
Acoustic characteristics | , , ] | , ] | |
Visual characteristics | ] | ||
Spatial characteristics | ] ] | , , ] ] | |
Physical environment characteristics | , ] ] ] |
Type of Personal Factors | Barriers | Facilitators |
---|---|---|
Motivation | , , ] , ] ] ]“if you don’t reach out, you get nothing; you get to stay alone, sitting in your corner.” [ ] | , , ] , , ] , ]: , , ] |
Physical and psychological conditions | ]: , ] ] , ]“I am embarrassed. People think that I am crazy, and I am not. I don’t dare to talk to strangers. I feel ashamed.” [ ] |
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Poirier, S.-È.; Voyer, L.-A.; Poulin, V.; Lamontagne, M.-E.; Monetta, L. Communication Challenges for People with Chronic Aphasia: A Systematic Qualitative Review of Barriers and Facilitators in Local Services. Disabilities 2024 , 4 , 616-631. https://doi.org/10.3390/disabilities4030038
Poirier S-È, Voyer L-A, Poulin V, Lamontagne M-E, Monetta L. Communication Challenges for People with Chronic Aphasia: A Systematic Qualitative Review of Barriers and Facilitators in Local Services. Disabilities . 2024; 4(3):616-631. https://doi.org/10.3390/disabilities4030038
Poirier, Sarah-Ève, Laurie-Anne Voyer, Valérie Poulin, Marie-Eve Lamontagne, and Laura Monetta. 2024. "Communication Challenges for People with Chronic Aphasia: A Systematic Qualitative Review of Barriers and Facilitators in Local Services" Disabilities 4, no. 3: 616-631. https://doi.org/10.3390/disabilities4030038
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Describing how sources converse each other. Organizing similar ideas together so readers can understand how they overlap. Synthesis helps readers see where you add your own new ideas to existing knowledge. Critiquing a source. Simply comparing and contrasting sources. A series of summaries. Direct quotes without using your own voice.
If it's your first time writing a literature review, you definitely want to use this link to get 50% off the course (limited-time offer). Overview: Literature Synthesis ... let's quickly define what exactly we mean when we use the term "synthesis" within the context of a literature review. Simply put, literature synthesis means going ...
A synthesis matrix helps you record the main points of each source and document how sources relate to each other. After summarizing and evaluating your sources, arrange them in a matrix or use a citation manager to help you see how they relate to each other and apply to each of your themes or variables. By arranging your sources by theme or ...
This is the point where you sort articles by themes or categories in preparation for writing your lit review. You may find a synthesis matrix, like this one, or in the box below, helpful in understanding how this works. You can sort the literature in various ways, for example: by themes or concepts
Analyze what you learn in (4) using a tool like a Synthesis Table. Your goal is to identify relevant themes, trends, gaps, and issues in the research. Your literature review will collect the results of this analysis and explain them in relation to your research question. Analysis tips
Create your own literature review synthesis matrix using the Word or Excel files available in the Activity box. ... Synthesize and Apply. When writing a literature review, your objective is to provide an overview of the current state of knowledge about your topic. Throughout the research process, you will identify a variety of resources that ...
Literature reviews synthesize large amounts of information and present it in a coherent, organized fashion. In a literature review you will be combining material from several texts to create a new text - your literature review. You will use common points among the sources you have gathered to help you synthesize the material.
How to synthesize. In the synthesis step of a literature review, researchers analyze and integrate information from selected sources to identify patterns and themes. This involves critically evaluating findings, recognizing commonalities, and constructing a cohesive narrative that contributes to the understanding of the research topic. Synthesis.
Example of synthesizing sources. Let's take a look at an example where sources are not properly synthesized, and then see what can be done to improve it. Example: Poor synthesis. Lenneberg (1967) theorized that language acquisition could occur only within a critical period of development between infancy and puberty.
Synthesis is an important element of academic writing, demonstrating comprehension, analysis, evaluation and original creation. With synthesis you extract content from different sources to create an original text. While paraphrase and summary maintain the structure of the given source (s), with synthesis you create a new structure.
What is a literature review? Definition: A literature review is a systematic examination and synthesis of existing scholarly research on a specific topic or subject. Purpose: It serves to provide a comprehensive overview of the current state of knowledge within a particular field. Analysis: Involves critically evaluating and summarizing key findings, methodologies, and debates found in ...
Skill #3: Critique. As you are writing your literature review, you will want to apply a critical eye to the literature you have evaluated and synthesized. Consider the strong arguments you will make contrasted with the potential gaps in previous research. The words that you choose to report your critiques of the literature will be non-neutral.
The synthesis matrix is a chart that allows a researcher to sort and categorize the different arguments presented on an issue. Across the top of the chart are the spaces to record sources, and along the side of the chart are the spaces to record the main points of argument on the topic at hand. As you examine your first source, you will work ...
Step 1 Organize your sources. Step 2 Outline your structure. Step 3 Write paragraphs with topic sentences. Step 4 Revise, edit and proofread. When you write a literature review or essay, you have to go beyond just summarizing the articles you've read - you need to synthesize the literature to show how it all fits together (and how your own ...
Using a Synthesis Matrix ; 7. Write literature review; Synthesize. This is the point where you sort the articles and books by themes or categories in preparation for writing your lit review. You can sort the literature in various ways, for example: by themes or concepts. historically or chronologically (tracing a research question across time)
Examples of literature reviews. Step 1 - Search for relevant literature. Step 2 - Evaluate and select sources. Step 3 - Identify themes, debates, and gaps. Step 4 - Outline your literature review's structure. Step 5 - Write your literature review.
Writing a Literature Review. A literature review is a document or section of a document that collects key sources on a topic and discusses those sources in conversation with each other (also called synthesis ). The lit review is an important genre in many disciplines, not just literature (i.e., the study of works of literature such as novels ...
A literature review is not an annotated bibliography, organized by title, author, or date of publication. Rather, it is grouped by topic to create a whole view of the literature relevant to your research question. Figure 7.1. Your synthesis must demonstrate a critical analysis of the papers you collected as well as your ability to integrate the ...
Learn how to synthesise the existing literature for your literature review by addressing five key questions. In this video, we explain exactly how you can en...
Literature reviews take time. Here is some general information to know before you start. VIDEO -- This video is a great overview of the entire process. (2020; North Carolina State University Libraries) --The transcript is included. --This is for everyone; ignore the mention of "graduate students". --9.5 minutes, and every second is important.
The topic must at least be: interesting to you (ideally, you should have come across a series of recent papers related to your line of work that call for a critical summary), an important aspect of the field (so that many readers will be interested in the review and there will be enough material to write it), and.
A literature review is an integrated analysis-- not just a summary-- of scholarly writings and other relevant evidence related directly to your research question. That is, it represents a synthesis of the evidence that provides background information on your topic and shows a association between the evidence and your research question ...
This article is a practical guide to conducting data analysis in general literature reviews. The general literature review is a synthesis and analysis of published research on a relevant clinical issue, and is a common format for academic theses at the bachelor's and master's levels in nursing, physiotherapy, occupational therapy, public health and other related fields.
The literature review is a fundamental component of academic work, serving to synthesize existing knowledge, critique methodologies, and potentially generate new insights through reconceptualization.
Using a Synthesis Matrix ; 7. Write literature review; Using a Synthesis Matrix. A synthesis matrix visually represents your research by organizing your sources by themes: Theme #1 Theme #2 Theme #3; Source #1 : Source #2 : Source #3 : Sample Synthesis Matrix. Example provided by Ashford University Writing Center.
PhD: An uncommon guide to research, writing & PhD life By James Hayton (2015) PhD: an uncommon guide to research, writing & PhD life is your essential guide to the basic principles every PhD student needs to know. Applicable to virtually any field of study, it covers everything from finding a research topic, getting to grips with the literature, planning and executing research and coping with ...
Whether you are new to synthesis essay writing or have been writing this kind of essay in high school or college, our guide will help you understand the subject thoroughly. We will talk about everything you need to know, starting from the component of a synthesis essay, outlining, writing, and refining your final draft.
Aphasia is an acquired communication disorder caused by a cerebral lesion, such as a stroke. People with aphasia can experience various difficulties that may involve speaking, listening, reading, or writing. These difficulties have multiple impacts on their expression of their needs, interests, and opinions. Accordingly, people with aphasia often encounter barriers and facilitators when using ...