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Year : 2020  |  Volume : 66  |  Issue : 1  |  Page : 1-6

Peer reviewing an original research paper

Department of Pediatrics, Seth G.S. Medical College and KEM Hospital, Parel, Mumbai, Maharashtra, India

Date of Submission11-Sep-2019
Date of Acceptance26-Sep-2019
Date of Web Publication13-Jan-2020

Correspondence Address:
M S Tullu
Department of Pediatrics, Seth G.S. Medical College and KEM Hospital, Parel, Mumbai, Maharashtra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jpgm.JPGM_492_19

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How to cite this article:
Tullu M S, Karande S. Peer reviewing an original research paper. J Postgrad Med 2020;66:1-6

How to cite this URL:
Tullu M S, Karande S. Peer reviewing an original research paper. J Postgrad Med [serial online] 2020 [cited 2023 Sep 23];66:1-6. Available from:

In our earlier editorials on research and medical writing, we have discussed the importance of research; we have given a roadmap for drafting an original research article and have also provided suggestions on how to publish research papers successfully.[1],[2],[3] In this editorial, we discuss the process of peer review and method for writing good reviews for original research papers. The authors, reviewers, and editors form the vital links in the process of publication and scientific communication and hence they need to understand their roles and “shared” responsibilities in this process.[4],[5] The authors need to ensure that they adhere to good science and ethics while the reviewers need to be meticulous, unbiased, sincere, supportive, and constructive while giving their reviews.[4],[5] The editors need to be unbiased and disciplined and follow best practices while handling the manuscripts received by the journal.[4]

The editors do largely depend on the opinions given by the reviewers of a manuscript while making critical decisions, though they are not obligated to do so.[4],[6],[7] Peer review is primarily the assessment/evaluation of research by an expert in a particular field.[4] It is a critical component of the publication process and helps to maintain a high quality of published research.[4],[6],[7] With the explosion in the number of scientific biomedical journals and the large numbers of manuscripts submitted for publication, identifying appropriate reviewers, and retaining their services has become increasingly difficult for the journals. Prestigious indices such as the Index Medicus/PubMed and Scopus necessitate that the journals indexed with them follow a proper peer review process.[4] It is better to use the term “assessor” or “reviewer” instead of the older term “referee” as the final decision regarding a manuscript has to be taken by the editor and not the reviewer.[7]

The peer review process

This has been given elaborately in our earlier editorial on success in publishing a paper.[3] Once a paper is submitted on the website of a journal, the editor/subeditor checks the paper for completeness and adherence to their journal style. Permission from the Institutional Ethics Committee and compliance with appropriate informed consent/assent are checked. The paper is then circulated through some of the editorial board members for an “internal review” regarding the relevance, ethics, and methodology. The editorial board members submit their opinion (with relevant explanation) on whether the manuscript is worth processing for a formal peer review. The manuscript may be rejected at this stage if it is not suitable for the readership of the particular journal or if it has glaring ethical/methodological faults.[5] Only after passing the “internal review” process successfully, the manuscript is sent for an “external review” to the peer reviewers.

The editor/subeditor usually invites (usually by email) three to five experts in the field of the research paper to review the manuscript.[4],[7],[5] More reviewers get invited if some of these initial reviewers decline to review. On acceptance of the assignment, the reviewers are usually given about 4 weeks to perform the peer review. At times, however, the editor may ask for a rapid/fast review.[7] The manuscript management system can send automatic reminders to the reviewers.[7] The reviewers upload their comments to the authors and editors separately through the manuscript management system, with a confidential recommendation on acceptance/rejection/revision of the manuscript (this recommendation is sent to the editor only). The authors and reviewers are usually blinded to each other. Based on the reviews received and his/her own assessment of the manuscript, the editor/subeditor then takes a decision whether to reject the manuscript or invite a revision (minor/major revision) from the authors and the authors are informed accordingly. If a revision is invited, the authors are asked to give point-by-point reply to each of the reviewer's comments and to state the exact location in the (revised) manuscript text where the change has been incorporated (by underlining/highlighting the relevant changes or by colouring the revised text font).

Depending on the nature of the comments offered by the reviewers, the editor may take a decision whether to send the revised manuscript back to the original reviewers for their opinion (for deciding the adequacy of the revisions made by the authors). Most often the editors do send the revised manuscript back to the original reviewers for a rereview. At this stage, the reviewers can view the comments offered by the other reviewers, so that they can understand why particular changes have been made in the manuscript, which they did not advise for (and this helps as a learning tool for the reviewers as well).[6] The reviewers are requested to give their opinion on the revised manuscript in a similar fashion as the first review with comments to the authors and the editors separately. This process may continue until the manuscript is either rejected or accepted (with the changes asked by the reviewers and editor/s).

The editor/s respects the recommendations given by most the reviewers but make the final decision on their own (this decision may, at times, be contradictory to reviewer recommendations). In case of a tie on recommendations from the reviewers, the editor/s or a member of the editorial board may take a decision after a re-evaluation of all the reviewer opinions or an additional reviewer may be roped in for help in making a final decision.[5] The final decision that is made (acceptance/rejection) is usually conveyed to all the concerned reviewers.[6] Occasionally the editor/s may invite additional reviewers in case of conflicting reviewer opinions/recommendations. Editor/s consult their statistical consulting editor/statistical reviewer for papers with unfamiliar/difficult to understand (“heavy”) statistics.[5],[7],[8],[9] The editor may also invite one of the reviewers or subject experts to write an editorial commentary on the research paper which has thus been accepted for publication.

If the authors are unhappy with the editor's decision, they may represent their case back to the editor and if they are not satisfied with the same, they may approach the ombudsman/ombudsperson (a “neutral” person) appointed by the journal.[4] The ruling given by the ombudsman is honoured by the editor as well as the authors.[4] Some manuscript management systems prompt the authors to suggest preferred or nonpreferred reviewers while uploading their manuscript and authors can avail this facility.[4],[5],[7],[8],[10] However, it is not mandatory for the editor to necessarily choose the reviewers suggested by the authors.[4],[5],[8]

The “blinded” versus the “open” peer review

Most journals follow a “single-blinded” (authors are blinded to the names of reviewers) or “double-blinded” peer review process (where the authors and reviewers are unaware of each other's identity).[4],[5],[7],[10],[11],[12],[13] The advantages of this “double-blinded” system include maintenance of confidentiality, likelihood of the reviewers giving an honest opinion/critique, protection of authors from their ideas getting stolen/plagiarized, and protection of junior reviewers from possible retribution from senior authors (since the identity of the junior reviewer is not known to the senior author/s).[4],[7],[11],[12] The disadvantages are that the reviewers may provide a very rude/harsh or extremely critical review (lesser accountability arising out of the reviewer anonymity) and a dishonest reviewer may use the process for self-promotion or some other ulterior motive (like plagiarism of the author's idea/hypothesis).[4],[7],[11]

The “open” peer review system is where the authors and reviewers know each other's identity.[4],[7],[10],[11],[12],[13] The advantage of the “open” peer review system is better accountability (and hence civility and courteousness) of the reviewers.[7],[10],[11] However, the disadvantages are that the reviewers may provide either noncritical reviews or decline to review papers of authors known to them.[4],[7],[10],[11],[12] At times, even in a blinded review process, the reviewers can guess the names of the authors/author-group, especially if they are working in a particular (similar) restricted field of science.[4],[7],[11],[14] Some journals may ask the reviewers to sign their reviews which are posted in the public domain for improving transparency.[7],[12]

Who can be a reviewer

A reviewer must have published a reasonable number (at least 5) of original research papers in the past so that they are well aware of medical writing and the peer review process. The editor invites a scholar/academician who has published on the topic similar to the research paper (in hand) or an expert who is a well-known authority on the particular subject or one who has successfully reviewed for the journal in the past.[5] While registering as a reviewer on the manuscript management website, the reviewer is asked to give his/her area/s of expertise (“keywords”); this also helps the editor in choosing appropriate reviewers.[7] Most journals have a database of the potential reviewers for their own journal/consortium and the editor can select reviewers using “keywords”.[5],[7],[8] An interested researcher may send his/her curriculum vitae to particular journal/s and request for empanelment as a potential reviewer.[4] Being a reviewer is considered to be an honour, privilege, and duty of researchers/academicians and one should (usually) not refuse to review a paper if they have the expertise to do so and ensure that they can spare their time to complete the review.[4],[7]

Reviewing is an unpaid/voluntary work used as a measure of academic esteem by universities and usually not rewarded with any money.[7],[8],[15] Most journals publish the names of those who have reviewed for their journal once a year as a tribute to the reviewer's services and may reward the reviewer by giving complimentary access to their journal/group of journals for a limited period of time.[7],[11],[15] On average, reviewers spend up to 5 h (median time used) to 9 h (mean time used) for each review and review regularly for about three to four journals.[7],[11]

Training of reviewers

Most reviewers learn the review process by trial and error (i.e., self-taught).[5],[8],[15] Though no particular training is necessarily available for one to become a reviewer, training oneself using tutorials available on the manuscript management websites or journals websites or by attending workshops/editorial fellowships and reading literature/books on peer review, does help.[4],[5],[7],[10],[12],[13],[15],[16] Some senior academicians may mentor their junior colleagues as well.[5],[8],[15]

Attributes/characteristics of a good reviewer

A good reviewer provides a useful and timely review of the manuscript. [Table 1] gives the attributes/characteristics of a good reviewer.[2],[3],[7],[10],[14],[15]
Table 1: Characteristics of a good reviewer[2],[3],[4],[5],[6],[7],[10],[14],[15]

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Responsibilities of a peer reviewer

Reviewing a paper is an academic privilege.[7] With authority, there exist great responsibilities that the reviewers should be ready for. Some of them are enlisted in [Table 2].[4],[5],[6],[7],[8],[9],[10],[11],[12],[14],[15],[17],[18]
Table 2: Responsibilities of peer reviewer/s[4],[5],[6],[7],[8],[9],[10],[11],[12],[14],[15],[17],[18]

Click here to view

Advantages and disadvantages of the peer review system

Peer review ensures that the research published in a journal has a good quality. This is probably the only method of identifying publishable research from numerous manuscripts received by a journal. The advantages and disadvantages of the peer review system are given in [Table 3][4],[5],[7],[10],[11],[12],[14],[15],[17],[19],[20] and [Table 4],[4],[5],[7],[10],[12],[13],[14],[16],[20],[21],[22] respectively. Recently, there have been peer reviewer frauds/scams and rigged peer reviews i.e., authors creating fake email addresses and suggesting the same to editors as possible reviewers and reviewing their own manuscripts; fabricated reviews by agencies that help authors to write manuscripts and then selling them favourable reviews; and cyber fraud by hacking/manipulating the peer review computerized systems by unscrupulous authors posing as expert reviewers and reviewing their own manuscripts. This has led to the retraction of such papers by various journals.[12],[14],[16],[21]
Table 3: Advantages of the peer review system[4],[5],[7],[10],[11],[12],[14],[15],[17],[19],[20]

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Table 4: Disadvantages of the peer review system[4],[5],[7],[10],[12],[13],[14],[16],[20],[21],[22]

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Writing the actual review

The reviewer should be acquainted with the instructions to authors and the readership of the journal that they are reviewing for. The reviewer is expected to give a separate set of comments to the authors and to the editor. The comments to the authors relate to the science and draft of the manuscript; while the comments to the editor are regarding the overall manuscript evaluation and recommendation on acceptance or otherwise (these “confidential” comments to the editor cannot be viewed by the authors).[5] The reviewer is expected to help the editor in making a decision on the suitability of the manuscript for publication and how a manuscript can be improved upon.[7] Unacceptable flaws related to ethics or methodology need to be identified by the reviewer (this is, at times, already done by the editor/editorial board members in their “internal review”).[7],[15] The reviewer, hence, even if an expert at a given topic, needs to read more literature about the topic to decide about the originality and quality of the paper.[7],[15] Occasionally, the reviewer may unearth misconducts such as duplicate publication or salami (splitting research to create multiple papers) publication or plagiarism in the process of reviewing the (current) literature.[7],[15]

Comments to authors: It is advisable to start with a summary stating the essential crux of the paper.[7],[8] This assures the editors and the authors that the paper has been read completely and understood by the reviewer. Then either list the concerns as “major” and “minor” concerns or proceed section-wise (that is from the title, abstract, introduction, etc. up to the references section) to give specific comments.[7],[8],[17] [Table 5] gives a format of a checklist which will help the reviewers in giving a complete review for a research article.[2],[3],[5],[8],[9],[11],[15],[17],[18],[23] Such a checklist also helps the reviewers and reminds them of the various items/aspects that they need to evaluate in a research article. Standardized checklists like the CONSORT (consolidated standards of reporting trials) and STROBE (strengthening the reporting of observational studies in epidemiology), which are available at and used by authors (to draft their manuscript), are usually mentioned in their instructions to authors by the journals and can also be used for assisting the reviewers.[2],[7],[8],[9],[13] Similar checklists/questionnaires are used by the journals as well, and the reviewers are asked to rate the manuscript based on the same.[5] It is a good idea to number the comments so that the authors can reply point-wise (should a revision be invited from the authors). The primary work of the reviewer is to assess the science and ethics of the manuscript. It is not mandatory to comment on the grammar or syntax as this is the work of the copyright editor/assistant; however, guidance on language is welcomed by the editors. Though there are no recommendations on the length of the reviewer's report, about 1.5 to 2 single-spaced pages are usually enough.[8] The “gatekeepers” of scientific communication (editors and reviewers) need to review the scientific/discipline-based content (the “screening” function) of a paper as well as look at improving the paper as a tool for written communication (the “improving” function).[19] Some reviewers may prefer to mark their comments on a pdf or word version of the submitted manuscript and upload the same for the authors viewing and revision.[5]
Table 5: Checklist for giving a complete review for a research article[2],[3],[5],[8],[9],[11],[15],[17],[18],[23]

Click here to view

Comments to the Editors: The strengths and weaknesses of the paper should be clearly identified by the reviewer in their confidential comments to the editors.[5],[8],[15],[17] The recommendation (if) given by the reviewer (reject, major revision, minor revision, or accept) should be supported by their main review. The reviewers may suggest an appropriate journal section for which the manuscript can be assigned to. The reviewers may also ask for changes in the format/type of the manuscript (e.g., an original article to be converted to a brief original article/report or a research letter).[8] These recommendations are useful to the editors but not necessarily binding on them.

Recent concepts

Some journals have started using “postpublication” system, wherein the reviewed and the accepted manuscript is posted on the website in advance of the paper publication; readers comment on the same and such (reader's) comments can be actually published with the manuscript itself.[5],[7],[10],[11] Many open access journals have started following the “light touch peer review” wherein the review is focused on the methodology.[7] Some journals publish the peer reviewer comments or the entire “prepublication history” (submitted versions, reviewer's reports, and author responses) and the timelines online (as a weblink) with the journal article.[7],[12] There are journals where a reviewed manuscript draft is posted electronically for critique by the academic community and after a defined period, the modified draft paper is accepted for publication.[7],[12] In journal review networks/peer review consortia, the reviews are transferred from one journal to another after rejection, this saves on reviewer/editor time and reduces duplication of work.[5],[10],[13] “Publons” ( is a website which builds public reviewer profiles for participating reviewers. The “Publons” profile shows a researcher's verified review history across all journals, gives various reviewer metrics, and gives credits for work as a reviewer/editor. Useful guidance on ethics of publication and peer review is available on the COPE (Committee on Publication Ethics) website ( and authors, reviewers, and editors need to be acquainted with these.

Concluding remarks

It is an honour and privilege to review papers and reviewers need to do it with a sense of responsibility, integrity, and altruism.[7],[15] The reviewer needs to be polite and systematic while performing the review. Proper reviewer conduct makes the peer review process valuable and the journal becomes more trustworthy.[15] Peer review has thus been called the “heart and soul of scientific publishing”.[15] A systematic well-organized review is appreciated by the editors/authors and facilitates manuscript revision.[17] The entire peer review process is based on mutual trust between the authors and editors and also between the editors and reviewers.[15] This editorial has given an account of the peer review process and guidance for the reviewer to write good (and practically useful) reviews. It is hoped that this editorial will help the reviewers in their career in reviewing as well as assist the authors in medical writing.

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  [Table 1], [Table 2], [Table 3], [Table 4], [Table 5]

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