Explainer · Plain-language
What is peer review?
Peer review is the process by which scholarly work is evaluated by independent experts in the same field before — or sometimes after — publication. It is the principal quality-control and certification mechanism of academic publishing.
The step most authors miss
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What peer review does
When a manuscript is submitted to a journal, an editor sends it to independent experts who assess the methods, evidence, and conclusions and recommend acceptance, revision, or rejection. The aim is to filter out flawed work, improve sound work, and certify that what is published has met the field's standards. It is central to the idea of a peer-reviewed version of record.
The main models
In single-anonymous review the reviewers know the authors' identities but not vice versa. In double-anonymous review both sides are anonymised, which can reduce bias. In open peer review identities are disclosed and reports may be published alongside the article. In post-publication review the work is published first and evaluated openly afterwards, as with some preprint-overlay and commenting platforms.
Strengths and limitations
Peer review improves manuscripts and signals credibility, but it is not infallible: it can be slow, inconsistent between reviewers, vulnerable to bias, and poor at detecting deliberate fraud. Recognising this, many publishers experiment with transparency, reviewer training, and structured reporting, and research-integrity bodies such as COPE issue guidance on review ethics.
Recognising review as a contribution
Peer review is substantial scholarly labour that has historically gone uncredited. Services such as recognising reviewers through ORCID, and contributor vocabularies that extend beyond authorship, aim to make reviewing visible — an area the CASRAI Dictionary's contribution and integrity vocabulary engages with.
Key facts
At a glance
- Purpose: independent expert evaluation of research
- Models: single-anonymous, double-anonymous, open, post-publication
- Outcome: accept, revise, or reject; certifies the version of record
- Timing: usually pre-publication; can be post-publication
- Ethics: COPE provides guidance for editors and reviewers
- Limitation: slow, variable, and not a guaranteed fraud detector
Common misconceptions
What people often get wrong
Often heard: Peer review guarantees a paper is correct.
Actually: No — peer review improves and filters work and signals credibility, but it is not infallible and does not guarantee correctness or detect all misconduct.
Often heard: All peer review is anonymous on both sides.
Actually: Not necessarily — single-anonymous, open, and post-publication models all exist; double-anonymous is just one option among several.
Going deeper
