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Literature Review Example: Four Structures and an Annotated Sample
A literature review groups what researchers have found on a question, shows where they agree and disagree, and names the gap your work fills. Most student reviews fail the same way: a paragraph per source, in the order the student found them. This guide shows one topic written under four different structures, a full synthesis paragraph with its moves labelled, and the matrix that produces one. Checked September 2026.
Quick Answers
| Question | Answer |
| What is a literature review? | A synthesis of existing research on one question, ending in a gap |
| Four common structures | Thematic, chronological, methodological, theoretical |
| Most common structure | Thematic, in most social science and health disciplines |
| Summary or synthesis? | Synthesis. Grouping sources by claim, not describing them one by one |
| How long? | A few pages inside an essay, 20 to 40 for a thesis chapter |
| Does it need an argument? | Yes. A review with no claim reads as an annotated bibliography |
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What Does a Literature Review Look Like?
Three parts: an introduction that frames the question, body sections grouped by idea, and a conclusion naming the gap.
The body is where structure matters. Each section should open with a claim about the literature, not with an author’s name. If your paragraphs start “Smith (2019) found” and “Patel (2021) argued”, you have written a reading log.
The University of Toronto’s guidance makes the same point: a review organizes research around ideas rather than around sources.
Summary or Synthesis? The Difference That Decides Your Grade
Summary describes sources one at a time. Synthesis makes a claim and uses several sources as evidence for it.
Weak, three sources summarized:
Brown (2016) surveyed 400 teenagers and found that those reporting more evening screen use also reported shorter sleep. Patel (2019) studied 250 students and found a similar association. Chen (2022) used device-tracked screen time on 180 adolescents and found a weaker relationship than earlier studies.
Strong, the same three sources synthesized:
The association between evening screen use and shorter sleep appears across self-report studies (Brown, 2016; Patel, 2019), but weakens when screen time is measured by the device rather than recalled by the participant (Chen, 2022). The pattern suggests a measurement problem as much as a behavioural one. Recall-based estimates may capture how disrupted a teenager feels rather than how long they used a screen.
The weak version reports three studies. The strong version makes one argument and uses three studies to support it. Author names appear in the strong version too. They sit in brackets, doing evidence work rather than leading the sentence.
Author names in these examples are illustrative, showing the pattern rather than citing real studies.
The MAP Structure for a Synthesis Paragraph
Three moves build a synthesis paragraph: Map the agreement, Argue the tension, Point to the gap.
- Map. State what the literature agrees on, citing two or more sources together.
- Argue. Name where they disagree, and why.
- Point. Say what this leaves unanswered.
The strong paragraph above runs the first two moves. Adding the third finishes it:
No study to date has tracked both device-measured screen time and objective sleep in the same Canadian adolescent sample, which leaves the measurement question open.
That sentence is what turns a literature review into a justification for your own research, which our research proposal guide covers in detail.
Literature Review Example: One Topic, Four Structures
The same sources can be organized four ways, and the structure you choose changes what the reader notices. Topic: evening screen use and adolescent sleep.
Thematic
Research on evening screen use and adolescent sleep separates into three concerns: how screen time is measured, the mechanism connecting screens to sleep loss, and whether interventions change either. The measurement literature shows the sharpest divide, with self-report and device-tracked studies producing different effect sizes.
Grouped by idea. Most common structure, and the default in health and social sciences.
Chronological
Early work in this area was correlational, relying on adolescent self-report of both screen use and sleep duration. From the mid-2010s, experimental designs began manipulating evening light exposure directly. The most recent studies use device-level tracking, and report smaller associations than the survey era suggested.
Grouped by time. Use it when the field has changed, not to list studies oldest to newest.
Methodological
Studies in this area fall into three designs. Cross-sectional surveys dominate the literature and carry the recall limitations common to self-report. Laboratory experiments isolate light exposure under conditions unlike a teenager’s bedroom. Device-tracking studies improve measurement precision. They lose information about what the screen was used for.
Grouped by how the research was done. Strong choice when methods explain conflicting findings.
Theoretical
Three explanations compete. Displacement theory holds that screen time takes the place of sleep time. Arousal accounts attribute the effect to cognitive and emotional stimulation. Circadian models point to blue light suppressing melatonin. Each predicts a different intervention, and the evidence does not yet separate them.
Grouped by framework. Common in thesis chapters where the review establishes a theoretical position.
Which One Should You Use?
Ask what your sources disagree about. If they disagree about ideas, go thematic. If they disagree because they used different methods, go methodological. If the field changed, go chronological. If they hold different theories, go theoretical.
Not Sure Your Review Synthesizes?
Our editors read for the failure that costs the most marks: paragraphs organized by source instead of by claim. See current prices or send your draft for a quote.
How Do You Build a Synthesis Matrix?
A synthesis matrix puts sources in rows and themes in columns, so patterns appear before you write.
| Source | Measurement | Mechanism | Intervention |
| Brown (2016) | Self-report | Displacement | Not tested |
| Patel (2019) | Self-report | Arousal | Not tested |
| Chen (2022) | Device-tracked | Displacement | Not tested |
| Okafor (2024) | Device-tracked | Circadian | Evening light filter |
Read the columns, not the rows. The measurement column shows the split that became the synthesis paragraph earlier on this page. The intervention column shows a near-empty field, which is a gap worth naming.
Building the matrix first is what prevents source-by-source writing. Florida International University publishes a worked synthesis matrix if you want a second format to compare.
How Long Should a Literature Review Be?
Length follows the assignment, not the topic.
| Context | Typical length | Sources |
| Section inside an undergraduate essay | 2 to 4 paragraphs | 5 to 10 |
| Standalone undergraduate assignment | 5 to 10 pages | 15 to 25 |
| Master’s thesis chapter | 15 to 30 pages | 40 to 80 |
| Doctoral chapter | 30 pages and up | 80 and up |
These are working ranges. Your supervisor or assignment sheet overrides them, and a short review that synthesizes beats a long one that lists.
Where Do You Find Sources Worth Reviewing?
Start with your library’s subject databases, not a general search. Most Canadian universities subscribe to Scopus, Web of Science, PsycINFO, CINAHL, or JSTOR depending on discipline.
Google Scholar is useful for citation chasing and useless for completeness, since it will not tell you what it missed. Use it to find the highly cited paper, then use the database to find what cites it.
Stop searching when new results keep returning the same papers. That is saturation, and it is the practical signal that your coverage is adequate. Our annotated bibliography guide covers evaluating each source once you have them.
How Do You Signal Agreement and Disagreement?
Your attribution verb tells the reader what you think of the source.
“Demonstrates” and “shows” signal that you accept the finding. “Claims”, “asserts”, and “suggests” hold it at arm’s length. “Argues” is neutral and marks the finding as contested.
Choose them with intent. A review where every source “states” something reads as flat reporting. A review that moves between “demonstrates” and “claims” shows judgment without editorializing.
Six Mistakes That Cost Marks
Five of these six come from organizing the review around sources instead of ideas.
- One paragraph per source, in the order you found them.
- No gap named, so the review leads nowhere.
- Sources listed with no claim above them.
- Long quotations where a paraphrase would carry the point.
- Uneven coverage, with one theme at four pages and another at one paragraph.
- No link back to your own research question.
The USC research guide covers the organizational choices in more depth, and our full how-to guide walks through the process from search to final draft.
Get Your Literature Review Reviewed
The difference between a B and an A is almost always synthesis. At Homework Help Global, our team works with Canadian students at every level:
- Structure review. We check whether your sections are organized by claim or by source, and whether the gap is stated.
- Editing and citations. Our editing service tightens the writing and formats references in APA or your required style.
- Graduate support. Our masters and PhD services cover thesis chapters, proposals, and the research papers that follow.
Place your order or start with a free quote. Send your draft, sources, and deadline, and Homework Help Global comes back with a price at no cost. Our Homework Help Show podcast covers research workflow between deadlines.
Frequently Asked Questions
What does a literature review example look like?
A literature review example has an introduction framing the research question, body sections grouped by theme rather than by source, and a conclusion naming the gap. Each body paragraph opens with a claim about the literature and cites several sources as evidence for it, rather than describing one study at a time.
What is the difference between summary and synthesis?
Summary describes sources one after another. Synthesis makes a claim about the literature and uses multiple sources as evidence for it. If your paragraph opens with an author’s name, you are summarizing. If it opens with a pattern across studies, you are synthesizing, which is what rubrics reward.
How do you structure a literature review?
Four structures are common: thematic, grouped by idea; chronological, grouped by time; methodological, grouped by research design; and theoretical, grouped by framework. Thematic is the default in most disciplines. Choose based on what your sources disagree about, since the structure should make that disagreement visible.
How long should a literature review be?
A review inside an undergraduate essay runs a few paragraphs with five to ten sources. A standalone assignment runs five to ten pages. A master’s thesis chapter runs 15 to 30 pages with 40 to 80 sources, and doctoral chapters run longer. Your assignment sheet or supervisor sets the real limit.
What is a synthesis matrix?
A synthesis matrix is a table with sources in rows and themes in columns. Filling it in before you write reveals which sources address which themes, where they agree, and where a column sits nearly empty. Those empty cells are often the gap your review should name.
Can someone help me with my literature review?
Yes. Homework Help Global works with Canadian students on literature reviews at undergraduate and graduate level. We check whether your sections are organized by claim rather than by source, whether the gap is stated, and whether your citations are formatted correctly. Send your draft through the free quote form for a price before any work starts.
