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 · Written and reviewed by Chris McGarrigle
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 LabStudents also ask
- What is a research gap?
- A research gap is a specific point where existing published work does not yet answer a question: an untested population, an unexamined context, a contradiction between studies, or a method that has never been applied to the problem.
- How do I find a research gap?
- Read the limitations and 'future research' sections of recent papers in your area, look for contradictions between studies, and check whether the population or setting you care about has ever been studied directly.
- Does an undergraduate dissertation need an original gap?
- It needs a defensible one, not a world-first. Applying an established framework to a new population, sector or region is a legitimate undergraduate contribution.
Related research: plan and question
Turn the topic into a defensible research question, aims, objectives and a proposal.
How to write a research question
What separates a strong dissertation research question from a weak one, with tests you can run on your own question before you commit to it.
Research aims and objectives: what they are and how to write them
The difference between a research aim and research objectives, with a method for writing objectives that are specific, achievable and assessable.
How to write a dissertation proposal
What a dissertation proposal must contain, how long each section should be, and how supervisors decide whether to approve it.
Building a realistic dissertation timeline
How to plan a dissertation timeline backwards from your deadline, with realistic time allocations for each stage and buffer for setbacks.
Continue your dissertation journey
- How to write a literature review
- How to build a literature matrix
- How to write a research question
- How to choose a dissertation topic
- Research aims and objectives: what they are and how to write them
Browse every guide in dissertation planning.
Read 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.