What Is Peer Review? Understanding Its Purpose and Steps

Peer review is a process in which a research paper is examined by people who have suitable knowledge or experience in the same or a related subject. For example, a paper on English language teaching may be reviewed by a teacher educator, a language researcher, or another expert in English education. The reviewer examines the paper and provides comments to help the editor decide whether it should be published.

The reviewer checks the quality of the research, the clarity of its presentation, the methods used, the evidence provided, and the conclusions drawn by the author. Peer review is not simply about finding spelling mistakes or correcting sentences. Its main purpose is to examine the quality and reliability of the research.

It is also important to understand that reviewers do not make the final publication decision. They offer their professional judgement and recommendations, while the journal editor makes the final decision.

Peer review serves several purposes. It helps check research quality. Reviewers examine whether the research question is clear, the methods are suitable, and the findings are supported by the evidence.

It helps authors improve their papers. Reviewers may identify missing explanations, unclear arguments, weak sections, or areas that need further discussion.

It supports responsible research. Reviewers may identify concerns about research ethics, the use of sources, data reporting, or possible plagiarism. Such concerns should be reported to the editor for proper examination.

It helps editors make informed decisions. Editors use reviewers’ comments, along with the journal’s policies and their own assessment, to decide whether a paper is ready for publication.

It supports readers. A careful review can help improve the clarity and reliability of the research that readers encounter in a journal.

Peer review cannot guarantee that every published paper is correct. Reviewers may miss errors, and even a carefully reviewed paper may have limitations. Nevertheless, a well-managed review process provides an important quality check.

Journals use different methods to manage peer review. The most common types include the following.

3.1 Single-blind peer review

In this method, the reviewer knows the author’s identity, but the author does not know the reviewer’s identity.

3.2 Double-blind peer review

In this method, the identities of the author and reviewer are kept hidden from each other during the review process, as far as possible. Author names and identifying details are usually removed from the manuscript before it is sent for review.

3.3 Open peer review

In an open review process, the identities of the author and reviewer may be known to each other. Depending on the journal’s policy, the review reports may also be published.

No single method is used by every journal. Authors and reviewers should check the journal’s instructions to understand which method applies.

Peer review generally involves several steps. The exact process may differ from one journal to another, but the following sequence explains how it usually works.

The author submits the manuscript to a journal according to its submission guidelines. The manuscript usually includes a title, abstract, main text, references, and other required sections. Depending on the type of research, it may also include tables, figures, questionnaires, ethical approval details, or supporting documents.

At this stage, the author should ensure that the paper follows the journal’s instructions and that all required files have been submitted.

After submission, the editor or editorial team checks whether the paper meets the journal’s basic requirements. The editor may consider:

A paper may be returned to the author for corrections or declined at this stage. A paper that passes the initial check is considered for peer review.

The editor identifies reviewers whose knowledge and experience match the subject of the paper. A reviewer should have sufficient expertise to assess the research fairly. Before accepting an invitation, the reviewer should consider three questions:

If a reviewer has a possible conflict of interest, it should be disclosed to the editor. If the reviewer lacks the necessary expertise or cannot complete the work on time, declining the invitation is appropriate.

Once the reviewer accepts the invitation, the first task is to read the entire paper to understand its main purpose and message. During this reading, the reviewer should ask:

The reviewer should make brief notes but avoid making a final judgement too quickly. The first reading helps the reviewer understand the paper as a whole.

The reviewer now reads the manuscript carefully, section by section. This is the most important part of the review.

Title and abstract: Does the title describe the study accurately? Does the abstract present the purpose, methods, main findings, and conclusion clearly? Introduction: Is the research problem clearly explained? Does the author show why the study is needed? Are relevant earlier studies discussed?

Review of related literature: Are the sources relevant to the research question? Has the author considered important studies on the topic? Are claims supported by suitable references? Research questions and objectives: Are they clear and consistent with the purpose of the study? Research methods: Are the methods suitable for answering the research questions? Has the author explained how participants or data were selected and how information was collected and analysed?

Results or findings: Are the findings presented clearly? Do the tables, figures, examples, or quotations support the points being made? Discussion: Does the author explain what the findings mean? Are they compared with earlier research where appropriate? Are important limitations acknowledged? Conclusion: Does the conclusion follow from the findings? Does the author avoid making claims that go beyond what the study can support?

References: Are the sources relevant and properly cited? Do the in-text citations match the reference list? Research ethics: Where applicable, has the author addressed consent, confidentiality, ethical approval, and the responsible use of data?

The reviewer should focus on issues that affect the quality and meaning of the research. Minor language problems may be noted, but they should not distract from more important concerns.

A good review recognises both what works well and what needs improvement. For example, a paper may address an important problem but provide an unclear explanation of its research methods. Another paper may use suitable methods but draw conclusions that are broader than the findings allow.

The reviewer should distinguish between major concerns and minor corrections. Major concerns are issues that may affect the reliability, meaning, or value of the research. Examples include an unsuitable research design, insufficient evidence, serious errors in data analysis, or conclusions that are not supported by the findings.

Minor concerns are smaller issues that can usually be corrected without changing the main research. Examples include unclear sentences, missing details in a table, inconsistent formatting, or incomplete references.

Each concern should be explained clearly. Instead of simply writing, “The methodology is weak,” the reviewer should identify the specific problem and explain what needs to be clarified or improved.

After examining the paper, the reviewer prepares a report for the journal. A useful review report usually contains four parts.

A. Brief summary

Start with a short description of the paper’s purpose, approach, and main findings. This shows that you have understood the work.

B. Overall assessment

Explain the main strengths of the paper and identify the most important concerns.

C. Specific comments

List the points that require attention. Where possible, refer to the relevant section, page, paragraph, or line number.

D. Recommendation to the editor

Provide a recommendation based on the journal’s available options and explain the reasons for it. For example, a reviewer might write:

“The paper addresses an important issue in teacher education and may be useful to researchers and practitioners. However, the research methods need a clearer explanation, particularly the selection of participants and the process used to analyse the data. The author should address these points before the paper can be considered further.”

This type of comment is useful because it identifies both a strength and a specific area for improvement.

After writing the report, the reviewer recommends an outcome. The available options depend on the journal, but they commonly include the following.

A reviewer should not select an option simply because they like or dislike the topic. The recommendation should be based on the quality of the research, the evidence presented, and the journal’s requirements.

A recommendation for revision does not mean that the paper will automatically be accepted after changes. Similarly, a recommendation to reject should be supported by clear reasons.

The final decision belongs to the editor.

The reviewer submits the completed report using the journal’s specified method, such as an online submission system or an email-based process.

If the journal provides separate spaces for comments to the author and confidential comments to the editor, the reviewer should use them correctly.

Comments intended to help the author improve the paper should normally appear in the report shared with the author. Concerns that require private communication with the editor, such as suspected plagiarism or a possible conflict of interest, should be raised confidentially.

The reviewer should follow the journal’s instructions and complete the review within the agreed deadline.

If the editor invites the author to revise the manuscript, the author may submit a new version along with a response explaining how each reviewer comment was addressed. The reviewer may then be asked to examine the revised paper. During this stage, the reviewer should check:

The reviewer should assess the revised paper fairly rather than repeat earlier comments without checking the changes.

The editor then considers the revised manuscript, the author’s response, and the review reports before making a decision.

The purpose of peer review is to assess research and help improve it. Reviewers should therefore be clear, fair, and respectful. Consider the following examples.

A reviewer should criticise the work, not the person who wrote it. Comments should explain the problem and, where possible, suggest a practical way to address it.

Reviewers should also remain open to different views. A paper should not be rejected merely because its conclusions differ from the reviewer’s personal opinion.

Peer review requires honesty, care, and respect for the work of others. Every reviewer should follow a few basic rules.

Maintain confidentiality. Do not share the manuscript, its data, or the review discussion with unauthorised people. Do not use unpublished findings for personal benefit.

Be fair and unbiased. Assess the paper on its quality rather than the author’s identity, institution, position, background, or personal relationship with the reviewer.

Disclose conflicts of interest. Inform the editor about any relationship or interest that could affect your judgement.

Give honest feedback. Do not invent problems, ignore important evidence, or recommend rejection without proper reasons.

Respect the author’s work. Use professional language and avoid insulting or personal remarks.

Raise ethical concerns responsibly. If you suspect plagiarism, fabricated data, or another serious concern, inform the editor and explain the basis for your concern. Do not make unsupported public accusations.

Follow the journal’s rules on artificial intelligence. Reviewers should not upload confidential manuscripts to AI tools unless the journal’s policy and the tool’s privacy arrangements clearly permit such use. AI tools should not replace the reviewer’s own reading, judgement, or responsibility. Reviewers must follow the specific policy of the journal handling the paper.

These responsibilities apply even when the review is anonymous.

Before submitting a review, a reviewer can use the following checklist.

This checklist does not replace the journal’s review form. It serves as a practical reminder of the main responsibilities involved.

Peer review is an important part of academic publishing. It gives researchers an opportunity to receive an independent assessment of their work and helps editors decide whether a manuscript meets the journal’s standards.

A good reviewer does more than identify mistakes. They read carefully, examine the evidence, recognise strengths, explain concerns, and offer suggestions that can help improve the paper.

For new reviewers, the process need not be intimidating. Understanding the purpose of the study, examining each section carefully, writing clear comments, and following ethical rules are good starting points.

The central principle is simple: review the research fairly, explain your judgement clearly, and help the author improve the work wherever possible. A thoughtful review respects both the quality of research and the effort involved in producing it.

Editorial note: The steps described above are general guidance. Reviewers should always follow the specific instructions and ethical policies of the journal to which the manuscript has been submitted.