The email arrives on an ordinary afternoon. The subject line reads "Decision on your manuscript," and the first sentence contains the word revision. Beneath it lies a list of reviewer comments that, at first glance, appears longer than the manuscript itself.
For many early-career researchers, this moment produces a mixture of disappointment, frustration, and quiet panic. It may therefore be reassuring to recognise that a request for revision is not a rejection. It is an invitation to continue the conversation. Revision appears to be the typical outcome of peer review rather than the exception, and even carefully designed studies frequently return with extensive comments.
What distinguishes a successful resubmission from a prolonged and painful one is rarely the number of comments received. It is, rather, the manner in which the authors respond to them. A well-constructed response letter demonstrates that each concern has been considered seriously, provides a scientific justification for every decision, and allows the editor to locate each change without effort. This guide sets out how such a letter may be prepared, how difficult comments may be handled, how disagreement can be expressed professionally, and which mistakes are most commonly made during revision.
1. The First Rule: Read Everything Before You Write Anything
The instinctive reaction to a long list of comments is to open the manuscript and begin correcting immediately. This impulse should be resisted.
A more productive approach is to read the complete set of comments at least twice, preferably with some time between readings. The first reading tends to be emotional; the second tends to be analytical. Only during the second reading does it typically become apparent which concerns are shared across reviewers, which are central to the editorial decision, and which are comparatively minor.
Once the comments have been understood as a whole, they can be sorted into three broad categories.
Major scientific concerns: Additional experiments, missing controls, methodological validity, statistical analysis, interpretation of results
Clarification requests: Explaining a method, justifying a methodological choice, rewording an ambiguous statement
Minor corrections: Typographical errors, figure labels, grammar, reference formatting
This triage transforms an overwhelming list into a structured work plan. It also allows the major concerns to be addressed first, since changes made in response to them may alter text that would otherwise have been corrected for minor reasons.
2. Decode the Comment: What Is Actually Being Asked?
Reviewers do not always state their requests directly. A comment may span several sentences while the underlying request is remarkably simple. Before any response is drafted, one question should be asked of every comment: what, precisely, does this reviewer need in order to be satisfied?
Consider the following example.
"The authors have discussed the role of oxidative stress, but the manuscript does not adequately explain how oxidative stress may contribute to the observed phenotype."
A student reading this comment might assume that a new experiment is being demanded. A closer reading suggests otherwise. The reviewer appears to be asking for one or more of the following: additional explanation, supporting literature, a clearer mechanistic hypothesis, or a more thorough interpretation of results that already exist.
Misreading a comment of this kind carries a real cost. Months may be spent on an experiment that was never requested, while the actual concern, a missing paragraph in the Discussion, remains unaddressed. Where genuine ambiguity exists, it is generally preferable to address the most plausible interpretation and to state that interpretation explicitly in the response.
3. The Architecture of a Good Response
The single most important rule of revision may be stated simply:
No reviewer comment should ever be left unanswered.
This applies even to comments with which the authors disagree, and even to comments concerning a misplaced comma. An unanswered comment tends to be interpreted as either oversight or evasion, and neither impression is helpful.
A clear and widely used format presents each comment in three parts.
Reviewer #1, Comment 1
Reviewer comment: [The reviewer's comment, reproduced verbatim.]
Response: [A clear explanation of how the concern has been addressed, or why it has not.]
Changes in the manuscript: [The exact nature and location of each change, for example, Page 7, Lines 142–156.]
This structure serves the reader. Reviewers are typically unpaid volunteers reading the manuscript for a second time, and a response that allows them to verify each change within seconds is likely to be received more favourably than one that requires them to search.
4. Gratitude Without Repetition
A professional response conventionally opens by acknowledging the reviewer's effort. Suitable openings include the following.
We thank the reviewer for this valuable comment.
We are grateful to the reviewer for highlighting this important point.
We thank the reviewer for this insightful suggestion, which has helped us to improve the clarity of the manuscript.
However, the same sentence copied forty times begins to read as automatic rather than sincere. Variation should be introduced, and for purely minor corrections a brief acknowledgement is sufficient. Gratitude is most convincing when it is specific, that is, when the response indicates what the comment actually improved.
5. Four Scenarios Every Researcher Will Encounter
Scenario A: The reviewer is correct
This is the most straightforward case, yet it is frequently handled poorly.
Reviewer comment: The description of the statistical analysis is insufficient and should be expanded.
A weak response reads:
Corrected.
A strong response reads:
Response: We thank the reviewer for drawing attention to this omission. We agree that the statistical analysis was insufficiently described in the original manuscript. The Statistical Analysis section has therefore been expanded to specify the statistical tests applied, the number of biological replicates, and the threshold used to determine statistical significance.
Changes in the manuscript: The Statistical Analysis section has been revised (Page X, Lines XX–XX).
The strong response communicates three things: that the concern was understood, that it was addressed, and where the change may be found. The single word "Corrected" communicates none of these reliably.
Scenario B: The reviewer is partially correct
Occasionally a reviewer identifies a legitimate issue but frames it in a way that does not fully apply to the study. The phrase "the reviewer is partially wrong" should never appear in a response. Instead, the valid element should be acknowledged first, and the scientific context explained afterwards.
Response: We appreciate the reviewer raising this important point. We agree that further clarification is required regarding the relationship between X and Y. However, the primary objective of the present study was to investigate Z, and a direct mechanistic assessment of the X–Y interaction was therefore beyond its scope. To address the reviewer's concern, this limitation has been stated explicitly, and the Discussion has been expanded to consider the possible relationship between these factors.
This approach concedes what deserves to be conceded while protecting the defined scope of the work.
Scenario C: The reviewer is, in your judgement, mistaken
It is important for students to understand that authors are not obliged to accept every reviewer comment. Reviewers may misunderstand a methodology, overlook a result, or hold a different but equally defensible interpretation. Disagreement is legitimate; it simply must be grounded in evidence rather than emotion.
The following phrases should be avoided entirely:
"The reviewer is wrong."
"We completely disagree."
"This comment is unnecessary."
"The reviewer clearly misunderstood our work."
A professional alternative reads:
Response: We thank the reviewer for raising this point. We respectfully disagree with the suggestion that X is required to support the principal conclusion of this study. The objective of the present work was to evaluate Y, which was addressed using three complementary approaches (A, B, and C). These approaches yielded consistent results, indicating [finding]. Nevertheless, to avoid any ambiguity, the Discussion has been revised to state the scope and limitations of this interpretation more clearly.
Two features of this response merit attention. First, the disagreement is supported by data already presented in the manuscript. Second, a concession is still offered in the form of a clarifying revision. Even where a reviewer has misunderstood the work, the misunderstanding itself suggests that the text could be clearer. The guiding principle may be summarised as follows: disagree with the argument, never with the person.
Scenario D: The reviewer requests an experiment that cannot be performed
Requests for additional animal experiments, electron microscopy, or further mechanistic studies appear to be among the most common sources of difficulty during revision. Constraints of funding, time, ethical approval, or equipment access may make such experiments impossible within the revision period.
The response "We cannot perform this experiment" is insufficient. A reason grounded in the design of the study should be provided, together with a demonstration of what the existing evidence does support.
Response: We thank the reviewer for this valuable suggestion and agree that the proposed experiment would provide additional insight into X. However, the present study was designed primarily to investigate Y, and the requested experiment falls outside its scope. The conclusions presented in the manuscript are based on the combined results of experiments A, B, and C. In light of the reviewer's comment, this limitation has been acknowledged explicitly in the revised manuscript, and conclusions extending beyond the available experimental evidence have been removed or softened.
The purpose of such a response is not to offer excuses. It is to demonstrate that the request has been considered scientifically and that the claims of the manuscript have been calibrated accordingly. Tempering overstated conclusions is often an acceptable substitute for a new experiment, since it removes the claim that the experiment was needed to support.
6. When the Reviewer Requests More References
A comment such as "The authors should include more recent references" can tempt authors to add a large block of citations indiscriminately. This approach is unlikely to satisfy a careful reviewer.
It is more effective to determine first what information the reviewer considers missing. The request may reflect outdated background literature, an unacknowledged competing study, or insufficient support for a specific mechanistic claim. Once the gap has been identified, a small number of directly relevant references is generally more persuasive than a long list.
Response: We thank the reviewer for this suggestion. The Introduction and Discussion have been updated to incorporate recent literature addressing the role of X in Y. These references provide additional support for the mechanistic interpretation presented in the revised manuscript.
Changes in the manuscript: Recent references have been added to the Introduction (Page X, Lines XX–XX) and the Discussion (Page X, Lines XX–XX), and the reference list has been updated accordingly.
Every added reference should be read, not merely cited. A reviewer who suggested a particular paper is, understandably, likely to check whether it has been represented accurately.
7. Common Mistakes That Prolong Revision
Several recurring errors appear to account for a considerable proportion of unnecessary second and third rounds of review.
Claiming changes that were not made. A response stating that a section has been revised, when the manuscript is unchanged, is among the fastest ways to lose a reviewer's trust. Every claimed change should be verified against the final file.
Incorrect line and page numbers. Line numbers shift as text is added. Locations should be recorded only after the manuscript has been finalised, and then checked again.
Revising the response but not the manuscript. A detailed explanation provided only in the response letter will not be seen by future readers of the paper. If a point required clarification for the reviewer, it probably requires clarification in the text as well.
Defensive or sarcastic tone. Frustration may be entirely understandable, but it should never reach the page. A draft written in anger is best set aside for a day and rewritten.
Ignoring conflicts between reviewers. Where two reviewers request contradictory changes, the conflict should be acknowledged, a reasoned choice should be made, and the editor should be informed of the rationale.
Missing the deadline without communication. If additional time is required, most editors appear willing to grant a reasonable extension when asked in advance. Silence, by contrast, may result in the submission being withdrawn.
8. Do Not Forget the Editor
The response to reviewers is normally accompanied by a short cover letter addressed to the handling editor. This letter should thank the editor and reviewers, summarise the most substantial revisions in a few sentences, and briefly note any point on which the authors have respectfully declined a suggestion, together with the reason. The editor ultimately makes the decision, and a concise overview helps them to do so efficiently.
It is also advisable to submit a version of the manuscript with changes highlighted or tracked, unless the journal specifies otherwise.
9. A Final Checklist Before Resubmission
Before the revised manuscript is submitted, the following questions should be answered honestly.
☐ Has every comment from every reviewer received a response?
☐ Does every claimed change actually appear in the manuscript, at the stated location?
☐ Have the line and page numbers been checked against the final version?
☐ Has each disagreement been supported by evidence and accompanied, where possible, by a clarifying revision?
☐ Have all newly added references been read and cited accurately?
☐ Has the response been read by a co-author or supervisor for tone as well as content?
☐ Has the cover letter to the editor been prepared?
Closing Thoughts
It is tempting to view peer review as an obstacle placed between a researcher and publication. A more productive perspective may be to regard reviewers as the first critical readers of the work, individuals who have invested their own time in identifying weaknesses before the wider scientific community does. Many published papers appear to be substantially stronger for having passed through this process.
The response letter is, in effect, a second piece of scientific writing. It demands the same clarity, rigour, and honesty as the manuscript itself. Students who learn to write it well early in their careers are likely to find that revision becomes less a source of anxiety and more a routine, and occasionally even rewarding, stage of research.
Dr. Lokender Kumar Ph.D. Postdoc | Researcher
9015483193