How to structure a literature review
Short answer
Literature review
A literature review is organised by theme, not by source. It argues toward the gap your study fills, grouping studies that speak to the same question and explaining where they agree, conflict and fall silent. It typically runs 20–30% of the total word count. The defining failure is the 'annotated bibliography' structure — one paragraph per source, in the order you happened to read them.
Thematic, not source-by-source
If your paragraphs begin 'Smith (2019) found…', 'Jones (2020) argued…', you have written a summary, not a review. Each paragraph should begin with a claim about the field, then use several sources as evidence for it.
Compare: 'Three studies have examined belonging and retention, but all sample from research-intensive institutions (Smith 2019; Jones 2020; Patel 2022), leaving post-1992 providers unexamined.' That one sentence does the work of three summary paragraphs and points at your gap.
Build a synthesis matrix first
Before writing, build a table: sources down the side, themes across the top. Fill in what each source says about each theme.
Your columns become your paragraphs. Empty cells are your gaps. This single step is what converts a summary into a review, and it takes about two hours.
How long should a literature review be?
Around 20–30% of the total word count: roughly 3,000 words in a 12,000-word master's dissertation, or 2,000 in a 8,000-word undergraduate one. A standalone review article is different and can run much longer.
Source count matters less than coverage. A 12,000-word dissertation typically cites 40–60 sources; a review that cites 200 usually has not read them closely.
The funnel
Open broad, narrow steadily, end at your specific gap. The last paragraph of the review should make your research question feel inevitable — the obvious next thing to ask.
If a reader reaches your question and is surprised by it, the review has not done its job.
Being critical without being dismissive
Critical does not mean negative. It means evaluating the strength of evidence: sample sizes, design limitations, contested measures, contexts that may not transfer.
The strongest reviews explain why studies disagree — different populations, different measures, different periods — rather than simply noting that they do.
Frequently asked questions
- How many sources should a literature review include?
- For a master's dissertation, typically 40–60. For an undergraduate dissertation, 25–40. Quality and relevance beat volume — examiners can tell when sources have been cited but not read.
- How recent do sources need to be?
- Most should be from the last five to ten years, but seminal work is cited regardless of age. A review of belonging that omits Tinto because he published in 1975 would be a weaker review, not a more current one.
- Can I include a theoretical framework in the review?
- Yes, and many programs expect it — either as the final section of the review or as its own short chapter. The framework should emerge from the literature you have just reviewed, not arrive from nowhere.
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