What is a research gap?
Research gaps explained in plain English: the main types of gap, how to find one in your reading, and how to write a gap statement you can defend.
8 min read · Reviewed 2026
A research gap is not an empty space in the world's knowledge that nobody noticed. It is a specific, evidenced limitation in what has already been published — and your job is to show it exists before you claim to fill it.
Gaps come in recognisable types. Once you know the types, you can spot them while reading instead of hoping one appears.
Common types of gap
Most dissertation-level gaps fall into one of these categories.
- Population gap: the phenomenon is well studied, but not with your group.
- Context gap: studied in one country, sector or setting, not yours.
- Method gap: only surveyed, never explored qualitatively (or vice versa).
- Contradiction gap: two credible studies disagree and nobody has resolved it.
- Temporal gap: the evidence predates a change that plausibly altered the picture.
- Theory gap: a framework has not been applied or tested where it should apply.
How to find one while reading
Go straight to the limitations and future research sections of recent papers and systematic reviews. Authors routinely tell you what they could not do. Three or four papers pointing at the same unfinished business is the strongest gap signal you will get.
Writing a gap statement you can defend
A defensible gap statement names what is known, cites who established it, states precisely what remains unknown, and explains why that matters. 'Little research exists' is not a gap statement — it is an admission that you have not searched properly.
Common mistakes
- Claiming no research exists when you simply have not found it.
- Describing a gap so large that one dissertation could not close it.
- Finding a gap that exists because the question is not worth asking.
- Asserting the gap without citing the literature that establishes it.
Try this: The limitations sweep
- Choose five recent papers close to your topic.
- Copy every sentence from their limitations and future research sections.
- Group the sentences into themes.
- Write one gap statement from the largest cluster, citing all the papers in it.
Do it in SuperDiss
Log what each source claims and where it stops — the gap shows up in the pattern.
Open the Literature LabRead next
How to write a literature review
How to move from a list of summaries to a synthesised, argued literature review that sets up your research question.
How to build a literature matrix
A literature matrix turns scattered reading into a synthesis engine. Here is what to put in each column and how to read patterns out of it.
This guide is general educational content. Your institution's regulations, handbook and supervisor's instructions always take precedence. Where a named framework is mentioned, consult the original source text rather than relying on this summary.