Что такое literature review
What (Exactly) Is A Literature Review?
A Plain-Language Explanation (With Examples)
By: Derek Jansen (MBA) & Kerryn Warren (PhD) | June 2020
If you’re faced with writing a dissertation, thesis or any of type of formal academic research, chances are you’ve encountered the term “literature review”. If you’re on this page, you’re probably not 100% what the literature review is all about. Well, the good news is that you’ve come to the right place – in this post, we’ll explain:
So, grab a hot cup of coffee (or whichever poison you prefer) and let’s dive in.
What is a literature review?
The word “literature review” can refer to two related things that are part of the broader literature review process. The first is the task of reviewing the literature – i.e. sourcing and reading through the existing research relating to your research topic. The second is the actual chapter that you write up in your dissertation, thesis or research project. Let’s look at each of them:
Reviewing the literature
The first step of any literature review is to hunt down and read through the existing research that’s relevant to your research topic. To do this, you’ll use a combination of tools (we’ll discuss some of these later) to find journal articles, books, ebooks, research reports, dissertations, theses and any other credible sources of information that relate to your topic. You’ll then summarise and catalogue these for easy reference when you write up your literature review chapter.
The literature review chapter
The second step of the literature review is to write the actual literature review chapter (this is usually the second chapter in a typical dissertation or thesis structure). At the simplest level, the literature review chapter is an overview of the key literature that’s relevant to your research topic. This chapter should provide a smooth-flowing discussion of what research has already been done, what is known, what is unknown and what is contested in relation to your research topic. So, you can think of it as an integrated review of the state of knowledge around your research topic.
This is quite an oversimplification, but it’s a useful starting point. We’ll discuss the full purpose of the literature review chapter next.
What is the purpose of a literature review?
The literature review chapter has a few important functions within your dissertation, thesis or research project. Let’s take a look at these:
Purpose #1 – Demonstrate your topic knowledge
Purpose #2 – Reveal the research gap that you’ll fill
The second function of the literature review chapter is to show what’s currently missing from the existing research, to lay the foundation for your own research topic. In other words, your literature review chapter needs to show that there are currently “missing pieces” in terms of the bigger puzzle, and that your research will fill one of those gaps. By doing this, you are showing that your research topic is original and will help contribute to the body of knowledge. In other words, the literature review helps justify your research topic.
Purpose #3 – Lay the foundation for your theoretical framework
For example, let’s say your research aims to identify the drivers of a certain outcome – the factors which contribute to burnout in office workers. In this case, you’d likely develop a theoretical framework which details the potential factors (e.g. long hours, excessive stress, etc), as well as the outcome (burnout). Those factors would need to emerge from the literature review chapter – they can’t just come from your gut!
So, in this case, the literature review chapter would uncover each of the potential factors (based on previous studies about burnout), which would then be modelled into a framework.
Purpose #4 – To inform your methodology
How do I find articles for my literature review?
Remember, the correct search keywords will be super important to get the right information from the start. So, pay close attention to the keywords used in the journal articles you read and use those keywords to search for more articles. If you can’t find a spoon in the kitchen, you haven’t looked in the right drawer.
One last tip – it’s important that you read recent sources . Things change quickly in the world of research and you want up to date information to support your literature. That’s not to say that the classics are irrelevant – but you need to make sure they’re up to date. It’s no use citing a piece of research that was very popular, but was subsequently found to have flawed results. Thankfully, within Google Scholar, you can filter results to a specific date range, so make use of this to ensure you keep your reading up to date.
How should I structure my literature review?
Unfortunately, there’s no generic universal answer for this one. The structure of your literature review will depend largely on your topic area and your research aims and objectives.
You could potentially structure your literature review chapter according to theme, group, variables chronologically or per concepts in your field of research. We explain the main approaches to structuring your literature review here. In general, it’s also a good idea to start wide (i.e. the big-picture-level) and then narrow down, ending your literature review close to your research questions. However, there’s no universal one “right way” to structure your literature review. The most important thing is not to discuss your sources one after the other like a list – as we touched on earlier, your literature review needs to synthesise the research, not summarise it.
Ultimately, you need to craft your literature review so that it conveys the most important information effectively – it needs to tell a logical story in a digestible way. It’s no use starting off with highly technical terms and then only explaining what these terms mean later. Always assume your reader is not a subject matter expert and hold their hand through a journey of the literature while keeping the functions of the literature review chapter (which we discussed earlier) front of mind.
Wrapping up…
In this post, we’ve (hopefully) answered the question, “what is a literature review?“. We’ve also considered the purpose and functions of the literature review, as well as how to find literature and how to structure the literature review chapter. If you’re keen to learn more, check out the literature review section of the Grad Coach blog, as well as our detailed video post covering how to write a literature review.
How to Write a Literature Review
As every student knows, writing academic essays and research papers is an integral part of the educational program. You create a thesis, support it using valid sources, and formulate systematic ideas to surround it. However, not all students know that they will also have to face another type of paper known as a Literature Review in college.
Literature Review Definition
As this is a less common academic writing type, students often ask: “What is a literature review?” According to the definition, a literature review is a body of work that explores various publications within a specific subject area, and sometimes within a set timeframe.
This type of writing requires you to read and analyze various sources that relate to the main subject and present each unique comprehension of the publications. Lastly, a literature review should combine a summary with a synthesis of the documents it uses. A summary is a brief overview of the important information in the publication; a synthesis is a re-organization of the information that gives the writing a new and unique meaning.
Typically, a literature review is a part of a larger paper, such as a thesis or dissertation. However, you may also be given it in the form of a stand-alone assignment.
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The Purpose
The main purpose of a literature review is to summarize and synthesize the ideas that were created by previous authors, without implementing personal opinions or other additional information.
However, a literature review’s objective is not just to list out summaries of sources; rather, it is to notice a central trend or principle seen within all of the publications. Just like a research paper has a thesis that guides it on rails, a literature review has a main organizing principle (MOP). The goal of this type of academic writing is to identify the MOP and show how it exists in all of your supporting documents.
Why is a literature review important? The value of such work is explained by the following goals it pursues:
Here are some example topics to give you an idea of what a literature review can be about:
How Long Is a Literature Review?
When facing the need to write a literature review, students tend to wonder “how long should a literature review be?” In some cases, the length of your paper’s body may be determined by your instructor. Be sure to read the guidelines carefully to learn what is expected from you.
If you haven’t been provided with any specific guidelines, it is recommended to keep your literature review around 15-30% of your entire paper. To give you a rough idea, that is about 2-3 pages for a 15-page paper. In case you are writing a literature review as a stand-alone assignment, its length should be specified in the instructions provided.
Literature Review Format: APA, MLA, and Chicago
The essay format you use should adhere to will be the citation style preferred by your instructor. Seek clarification from your instructor for several other components as well to establish a desired literature review format:
If you want to format your paper in APA style, then follow these rules:
For MLA style text, apply the following guidelines:
Finally, if you are required to write a literature review in Chicago style, here are the key rules to follow:
Structure of a Literature Review
How to structure a literature review: Like many other types of academic writing, a literature review follows a typical intro-body-conclusion style with 5 paragraphs overall. Now, let’s look at each component of the basic literature review structure in detail:
Introduction
You should direct your reader(s) towards the MOP (main organizing principle). This means that your information must start from a broad perspective and gradually narrow down until it reaches your focal point.
Start by presenting your general concept (Corruption, for example). After the initial presentation, narrow your introduction’s focus towards the MOP by mentioning the criteria you used to select the literature sources you have chosen (Macbeth, All the King’s Men and Animal Farm). Finally, the introduction will end with the presentation of your MOP that should directly link it to all three of the sources of literature.
Body Paragraphs
Generally, each body paragraph will focus on a specific source of literature laid out in the essay’s introduction. As each source has its own frame of reference for the MOP, it is crucial to structure the review in the most logically consistent way possible. This means that the writing should either be structured chronologically, thematically, or methodologically.
Chronologically
Breaking down your sources based on their publication date is a solid way to keep a correct historical timeline. If applied properly, it can present the development of a certain concept over time and provide examples in the form of literature. However, sometimes there are better alternatives we can use to structure the body.
Thematically
Instead of taking the “timeline approach”, another option can be looking at the link between your MOP and your sources. Sometimes, the main idea will just glare from a piece of literature. Other times, the author may have to seek out examples to prove their point. An experienced writer will usually present their sources by order of strength. For example, in “To Kill A Mockingbird”, the entire novel was centralized around racism; in “The Adventures of Huckleberry Finn”, racism was one of many themes.
Methodologically
As made obvious by the terminology, this type of structuring focuses on the methods used to present the central concept. For example, in “1984”, George Orwell uses the law-and-order approach and shows the dangers of a dystopia for a social species.
In “Frankenstein”, Mary Shelley exposes the character’s physical traits as repulsive and horrifying, forcing him to suffer in an isolated environment. By showcasing the various methods used to portray the MOP, the writer can compare them based on things like severity, ethicality, and overall impact.
Conclusion
After presenting your findings in the body paragraphs, there are 3 final objectives to complete in the essay’s conclusion. First, the author should summarize the findings they have made or found in other words, and briefly answer the question: “What have you learned?”
After discussing that information, the next step is to present the significance of the information in reference to our current world today. In other words, how can the reader take the information and apply it to today’s society? From that point, we finish off with a breadcrumb trail.
As the author, you want to leave the readers’ trail of thought within the actual essay topic. This provides them with a means of further investigation—meaning that the reader may consider where the discussion will go next.
Writing an Outline for a Literature Review
Students often underestimate the importance of planning the structure of their papers in advance. However, this is not a wise approach. Having a rough APA literature review outline (or other style outlines) will not only help you follow the right format and structure, but will also make the writing process simpler and help ensure that you include all of the important information without missing anything.
How to write a literature review outline: As you already know from the Structure section of this guide, every part of your literature review performs its own important role. Respectively, you should create your outline while keeping the general introduction-body-conclusion structure in mind and ensuring that each section meets its own objectives. However, it is important to remember that a literature review outline is slightly different from outlines of other types of essays because it does not provide new information. It focuses on existing studies relevant to the main topic.‍
Here is a literature review outline example on the subject of the Ebola virus to help you get it right:
Hopefully, this sample outline will help you to structure your own paper. However, if you feel like you need some more advice on how to organize your review, don’t hesitate to search for more literature review outline examples in APA or other styles on the Web, or simply ask our writers for help.
How to Write a Good Literature Review
Whether you are writing a literature review within the framework of a large research project (e.g. thesis, dissertation, or other) or as a stand-alone assignment, the approach you should take to writing generally remains the same.
Now, as you know about the general rules and have a basic literature review outline template, let’s define the steps to take to handle this task right:
Step 1: Identifying the Topic
This is probably the only matter you may approach differently depending on whether your literature review comes within a research paper or a separate assignment altogether. If you are creating a literature review as a part of another work, you need to search for literature related to your main research questions and problem. Respectively, if you are writing it as a stand-alone task, you will have to pick a relevant topic and central question upon which you will be collecting the literature. Earlier in this guide we suggested some engaging topics to guide your search.
Step 2: Conducting Research
When you have a clearly defined topic, it is time to start collecting literature for your review. We recommend starting by compiling a list of relevant keywords related to your central question—to make the entire research process much simpler and help you find relevant publications faster.
When you have a list of keywords, use them to search for valid and relevant sources. At this point, be sure to use only trusted sources, such as ones from university libraries, online scientific databases, etc.
Once you have found some sources, be sure to define whether or not they are actually relevant to your topic and research question. To save you time, you can read abstracts to get general ideas of what the papers are about, instead of the whole thing.
Pro Tip: When you finally find a few valid publications, take a look at their bibliographies to discover other relevant sources as well.
Step 3: Assess and Prioritize Sources
Throughout your research, you will likely find plenty of relevant literature to include in your literature review. At this point, many students make the mistake of trying to fit all of their collected sources into their reviews. We suggest looking at what you’ve collected once more, evaluate the available sources, and select the most relevant ones. You most likely won’t be able to read everything you find on a given topic and then be able to synthesize all of the sources into a single literature review. That’s why prioritizing them is important.
To evaluate which sources are worth including in your review, keep in mind the following criteria:
Furthermore, as you read the sources, don’t forget to take notes on everything you can incorporate into the review later. And be sure to get your citations in place early on. If you cite the selected sources at the initial stage, you will find it easier to create your annotated bibliography later on.
Step 4: Identify Relationships, Key Ideas, and Gaps
Before you can move on to outlining and writing your literature review, the final step is determining the relationships between the studies that already exist. Identifying the relationships will help you organize the existing knowledge, build a solid literature outline, and (if necessary) indicate your own research contribution to a specific field.
Some of the key points to keep an eye out for are:
Here are a few examples: Common trends may include a focus on specific groups of people across different studies. There may be increased interest among most researchers in certain aspects of the topic in terms of key themes. Contradictions may include some disagreement concerning the theories and outcomes of a study. And finally, gaps most often refer to a lack of research on certain aspects of a topic.
Step 5: Make an Outline
Although students tend to neglect this stage, outlining is one of the most important steps in writing every academic paper. This is the easiest way to organize the body of your text and ensure that you haven’t missed anything important. Besides, having a rough idea about what you are going to write about in the paper will help you get it right faster and easier.
Earlier in this guide, we already discussed the basic structure of a literature review and gave you an example of a good outline. At this stage of the workflow, you can use all of the knowledge you’ve gained from us to build your own outline.
Step 6: Move on to Writing
Having found and created all of your sources, notes, citations, and a detailed outline, you can finally get to the writing part of the process. At this stage, all you need to do is follow the plan you’ve created and keep in mind the overall structure and format defined in your professor’s instructions.
Step 7: Adding the Final Touches
Most students make a common mistake and skip the final stage of the process, which includes proofreading and editing. We recommend taking enough time for these steps to ensure that your work will be worth the highest score. Do not underestimate the importance of proofreading and editing, and allocate enough time for these steps.
Pro Tip: Before moving on to proofreading and editing, be sure to set your literature review aside for a day or two. This will give you a chance to take your mind off of it and then be able to get back to proofreading with a fresh perspective. This tip will ensure that you won’t miss out on any gaps or errors that might be present in your text.
These steps will help you create a top-notch literature review with ease! Want to get more advice on how to handle this body of work? Here are the top 3 tips you need to keep in mind when writing a literature review:
Literature Review Examples
You can find two well-written literature reviews by the EssayPro writing team below. They will help you understand what the final product of a literature review should ideally look like.
The first literature review compares monolingual and bilingual language acquisition skills and uses various sources to prove its point:
How to write a literature review
Published on February 22, 2019 by Shona McCombes. Revised on August 27, 2021.
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.
Writing a literature review involves finding relevant publications (such as books and journal articles), critically analyzing them, and explaining what you found. There are five key steps:
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.
Table of contents
Why write a literature review?
When you write a thesis, dissertation, or research paper, you will have to conduct a literature review to situate your research within existing knowledge. The literature review gives you a chance to:
You might also have to write a literature review as a stand-alone assignment. In this case, the purpose is to evaluate the current state of research and demonstrate your knowledge of scholarly debates around a topic.
The content will look slightly different in each case, but the process of conducting a literature review follows the same steps.
Writing literature reviews is a particularly important skill if you want to apply for graduate school or pursue a career in research.
Step 1: Search for relevant literature
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.
If you are writing a literature review as a stand-alone assignment, you will have to choose a focus and develop a central question to direct your search. Unlike a dissertation research question, this question has to be answerable without collecting original data. You should be able to answer it based only on a review of existing publications.
Research question example What is the impact of social media on body image among Generation Z?
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 if you discover new keywords in the process of your literature search.
Search for relevant sources
Use your keywords to begin searching for sources. Some useful databases to search for journals and articles include:
You can use boolean operators to help narrow down your search:
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.
To identify the most important publications on your topic, take note of recurring citations. If the same authors, books or articles keep appearing in your reading, make sure to seek them out.
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Step 2: Evaluate and select sources
You probably won’t be able to read absolutely everything that has been written on the topic—you’ll have to evaluate which sources are most relevant to your questions.
For each publication, ask yourself:
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 find out how many times an article has been cited on Google Scholar—a high citation count means the article has been influential in the field, and should certainly be included in your literature review.
The scope of your review will depend on your topic and discipline: in the sciences you usually only review recent literature, but in the humanities you might take a long historical perspective (for example, to trace how a concept has changed in meaning over time).
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.
You can use our free citation generator to quickly create correct and consistent APA citations or MLA citations. Want to check your literature review for plagiarism? Try Scribbr’s Plagiarism Checker for students.
Step 3: Identify themes, debates, and gaps
To begin organizing your literature review’s argument and structure, you need to understand the connections and relationships between the sources you’ve read. Based on your reading and notes, you can look for:
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.
Example of trends and gaps In reviewing the literature on social media and body image, you note that:
Step 4: Outline your literature review’s structure
There are various approaches to organizing the body of a literature review. You should have a rough idea of your strategy before you start writing.
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.
Thematic
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:
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.
Step 5: Write your literature review
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.
Introduction
The introduction should clearly establish the focus and purpose of the literature review.
Dissertation literature review If you are writing the literature review as part of your dissertation or thesis, reiterate your central problem or research question and give a brief summary of the scholarly context. You can emphasize the timeliness of the topic (“many recent studies have focused on the problem of x”) or highlight a gap in the literature (“while there has been much research on x, few researchers have taken y into consideration”). Stand-alone literature review If you are writing a stand-alone paper, give some background on the topic and its importance, discuss the scope of the literature you will review (for example, the time period of your sources), and state your objective. What new insight will you draw from the literature?
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:
Example of a paragraph in a literature review
Body image issues have been widely associated with social media usage, particularly in young women. The relation between media depictions and body image concerns is well-established; a meta-analysis by Grabe, Ward and Hyde (2008) concluded that exposure to mass media is linked to body image dissatisfaction among women. However, in an era of rapidly changing digital technologies, the mass media paradigm is no longer adequate for understanding how people engage with images, and the findings of older studies like this one may not be generalizable to younger generations. In light of this changing landscape, researchers have become increasingly interested in the specific effects of social media. Perloff (2014) theorizes that the interactive aspects of social media may influence its impact on body image, and mentions that young women are among the most active social media users. Several empirical studies have focused on Facebook usage in adolescent girls (Tiggermann & Slater, 2013; Meier & Gray, 2014) and in young adult women (Smith, Hames, & Joiner, 2013; Fardouly et al., 2015; Cohen, Newton-John & Slater, 2017), while a systematic review by Holland and Timmerman (2016) confirmed a relationship between social networking and body image for both women and men. Across these studies, there is consistent evidence that body image issues are influenced not by social media usage in general, but by engagement with the visual and interactive aspects of these platforms. Nonetheless, there is a lack of robust research on more highly visual social media (HVSM) such as Instagram and Snapchat that have gained more recent popularity among younger generations.
Conclusion
In the conclusion, you should summarize the key findings you have taken from the literature and emphasize their significance.
Dissertation literature review If the literature review is part of your thesis or dissertation, show how your research addresses gaps and contributes new knowledge, or discuss how you have drawn on existing theories and methods to build a framework for your research. Stand-alone literature review If you are writing a stand-alone paper, you can discuss the overall implications of the literature or make suggestions for future research based on the gaps you have identified.
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 & Editing service!
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Frequently asked questions about literature reviews
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:
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.