Every study has limits. A survey reaches only some people, an experiment controls only some conditions, and a field study in one region cannot speak for every region. The limitations section is where you say so, plainly and precisely, before anyone else points it out. In practice, a clear, honest limitations section is one of the strongest signs of a careful researcher.
This guide explains how to write limitations of the study step by step: what counts as a limitation, where the section belongs, how to phrase each limit, how to explain its impact, and how to turn limits into future research. If you are turning a longer work into an article, read our guide on how to convert your thesis into a journal article alongside this one, because limitations often need shortening when a thesis chapter becomes a journal paper.
Limitations are the constraints and conditions of your study that could affect its results or how far those results can be applied. They arise from your choices, such as design or sample, and from conditions outside your control, such as time or access. A limitation is not a mistake you are confessing, and it is not an apology. It is a factual statement about the boundaries of what your study can claim.
Consider a simple example. A study of feeding practices on twenty small dairy farms in one district can describe those farms well, but it cannot support claims about dairy farming across the whole country. The small, local sample is a limitation. Naming it does not weaken the study; it protects the study from being read as claiming more than it shows.
Reviewers read limitations as evidence of judgement. An author who can see the weak points of their own work is an author the reviewer can trust on the strong points too. When you name a limitation yourself, you control how it is discussed: you can explain why it arose, what you did to reduce its effect, and why the main finding still stands.
Honest limitations also help readers use your work correctly. Other researchers deciding whether to build on your study need to know its conditions: who was studied, where, with what method, and with what constraints. A paper that hides its limits may be cited wrongly or applied where it does not fit, which helps nobody, including the author.
In most journal articles, limitations appear near the end of the discussion section, after the interpretation of results and before the conclusion, or in a short subsection of the discussion headed "Limitations". Some journals ask for a combined "Strengths and Limitations" section; always follow the journal's author guidelines first, because the expected position varies by field and journal. In a thesis, limitations usually have their own subsection within the discussion chapter, and they are often longer than in a journal article. Our guide on how to write a thesis or dissertation explains how the thesis discussion chapter is organised.
Wherever the section sits, it should come after you have presented and interpreted your findings, not before. Readers need to understand what you found before they can judge what constrains it. Keep the section proportionate: for a typical journal article, one to three paragraphs covering the most important limits is usually enough.
To find your study's limitations, work through the study from design to reporting and ask, at each stage, what could have influenced the results. Start with the design: a cross-sectional study shows association at one point in time, not cause and effect over time. Then the sample: was it small, drawn from one place, or made up of volunteers who may differ from the wider population? Then measurement: were instruments self-reported, or was an outcome measured indirectly?
The table below organises the most common types with their typical impact and a phrasing pattern you can adapt. Include only the types that genuinely apply to your study, described in your own study's terms.
Write each limitation in three moves: name it, explain why it arose, and state what you did about it. First, name the limit specifically, with the detail a reader needs: not "the sample was limited", but "the sample consisted of twenty farms in a single district". Then, state any step you took to reduce the effect, such as standardising measurements or checking results in a subgroup. This pattern keeps the section factual and balanced instead of defensive.
Use careful, neutral language. Words such as "may", "could", and "might" are appropriate when you describe possible effects on the findings, because a limitation is usually a risk to interpretation rather than a proven error. Avoid exaggeration in both directions: do not dismiss a real limit with "this is not important", and do not undermine your own work with "this study is therefore unreliable". For example: "Because data were collected at a single time point, the study describes associations rather than changes over time."
The most common weakness in limitations sections is a list of limits with no explanation of why each one matters. For every limitation you name, add one sentence about its impact: does it narrow who the results apply to, weaken confidence in a particular finding, or leave a question unanswered? Be specific about which finding is affected.
It also helps to say, honestly, when a limitation does not overturn the main finding. If a limit affects a secondary result but the primary result is supported by more than one line of evidence, say so and explain why. A limitations section that treats every limit as equally serious is less useful than one that distinguishes the limits constraining the headline claim from those that merely qualify a detail.
Almost every limitation points to a next study, and editors value a limitations section that ends by looking forward. After explaining a limit, add a brief suggestion for future research that would address it: a larger or more diverse sample, a longer follow-up, a different setting, a direct measurement in place of a self-reported one, or a design that can test cause and effect.
This forward-looking move also strengthens your conclusion. A conclusion that acknowledges limits and then states what should be studied next leaves the reader with a clear sense of both what your study contributed and where the field should go. When you write the results and discussion, our guide on how to write the results and discussion sections shows how findings, interpretation, and limits fit together.
Limitations and delimitations sound similar but mean different things, and reviewers notice when they are confused. Limitations are constraints that arise during the study, whether from your choices or from conditions beyond your control, and they affect what can be claimed. Delimitations are the boundaries you set deliberately before the study begins: the population you chose to study, the region you focused on, the time period you covered, or the variables you decided to include.
In practice, keep the two apart in your writing. State delimitations where you describe the scope of the study, usually in the introduction or methods, so readers know what the study set out to cover. State limitations in the discussion, where readers judge what the study achieved. A deliberate choice, such as studying only small farms, is a delimitation; the fact that only twenty of those farms agreed to take part is a limitation.
Here are two short illustrative passages in the style of a journal limitations paragraph. Example one, a small survey study: "First, the sample was drawn from a single district and consisted of twenty farms, so the findings describe that setting and should not be generalised to other regions without further study. Second, feeding practices were reported by farmers rather than observed directly, which may introduce recall error; we reduced this risk by asking about the previous seven days only Third, the cross-sectional design captures association at one time point and cannot establish whether feeding practice causes the observed difference in yield."
Example two, an experimental study with practical constraints: "The trial was conducted on one farm over a single season, so seasonal variation could not be assessed. Measurement was limited to weekly visits, so daily variation within weeks remains unrecorded. Although the main outcome differed consistently between groups, the modest number of animals means the estimate is imprecise, and a larger trial is needed before the result is applied more widely."
Several mistakes recur in limitations sections. The first is vagueness: "the study had limitations" or "the sample was small" without numbers, places, or reasons tells the reviewer nothing. The second is the opposite, an exhaustive list of trivial issues that buries the important limits and makes the study sound weaker than it is. The third is blaming others: limitations should be stated factually, not used to criticise participants, institutions, or funders.
Another mistake is contradiction: a limitations section that says results cannot be generalised, followed by a conclusion that generalises them anyway. Read the limitations and the conclusion together before submission and make sure they agree. Hiding a limit that reviewers will certainly spot, such as a low response rate or a missing control group, damages trust more than the limit itself would have.
Use this checklist on the near-final draft, and ask a colleague to check it independently if possible:
When the checklist is complete, the limitations section is ready. At Global Academic Publishers, veterinary and animal sciences manuscripts can be submitted to the Global Journal of Veterinary and Animal Sciences (GJVAS), listed on our journals page; please note that the journal's ISSN and DOI are still in application.
| Limitation type | Typical impact | How to phrase it |
|---|---|---|
| Small or local sample | Results may not apply beyond the studied group | State size and setting |
| Cross-sectional design | Shows association at one time, not cause over time | Describe association; suggest follow-up |
| Self-reported measures | Recall or reporting bias may affect results | Name the measure; note the bias risk |
| Dropouts or low response | Those who stayed may differ from those who left | Give the numbers; note the risk |
| Single site or season | Local or seasonal conditions may shape the outcome | Name site and period |
| Unmeasured influences | Another factor may partly explain the result | Name the factor |
These authoritative external resources explain the reporting standards and ethics guidance mentioned in this guide:
How long should the limitations section be?
For a typical journal article, one to three paragraphs covering the limits that genuinely affect interpretation is usually enough. A thesis discussion chapter can carry a longer, more detailed limitations subsection. Follow the journal's guidelines first, and keep the section proportionate to the paper.
Should I mention every weakness in my study?
Mention every limit that affects how the findings should be read, stated specifically. Do not list trivial issues that have no bearing on interpretation, and do not invent limits that do not apply to your study. Reviewers value a focused, honest section over an exhaustive one.
Where does the limitations section go — in the discussion or as a separate section?
In most journal articles it sits near the end of the discussion, after the interpretation of results and before the conclusion, or as a short subsection headed "Limitations". Some journals ask for a combined "Strengths and Limitations" section. Always check the journal's author guidelines for the expected position.
Can limitations cause my paper to be rejected?
Limitations themselves rarely cause rejection; overstated claims that ignore obvious limits are far more likely to draw criticism. A paper whose conclusions match its evidence, with limits stated plainly, gives reviewers confidence. Hiding a limit reviewers will spot damages trust more than the limit itself.
What is the difference between limitations and delimitations?
Limitations are constraints that arise during the study and affect what can be claimed. Delimitations are boundaries you set deliberately before the study begins, such as the population, region, or period covered. State delimitations with the study scope, and limitations in the discussion.
How do I write limitations for a thesis compared with a journal article?
A thesis limitations subsection can be longer and more detailed, discussing methods and decisions at greater length. When converting a thesis into a journal article, shorten the section to the limits that affect the article's claims, and reword it for readers who have not read the thesis. See our guide on how to convert your thesis into a journal article for the full conversion process.