What Is a Peer Review & 8 Types of Peer Review Processes

• Apr 16, 2025
• 5 min read

• Tags: Academic Publishing, Journal Article

If you’re a student or researcher looking to get published in reputed academic journals, expect your paper to go through an extensive peer review process. What is peer review, and why is it important? You might have heard your professors/advisors mention the phrase when they are talking about scholarly work. 

With over 30,000 journals across the world and over 2 million articles being published each year, there is a lot of academic research that is generated each year! But how does the academic community know which ones of those are legitimate? 

Peer review is a quality control process in academic publishing to check the research’s validity and quality. This article will explore the meaning of peer review and the eight different types of peer review. So let’s dive straight into it!

What is peer review? 

Peer review is a process in which a researcher’s work is critically evaluated by experts from the researcher’s field before it is published in a journal or a conference proceeding. This means that articles published in peer-reviewed journals are vetted and verified as relevant research for the advancement of the subject. 

Peer reviewers help journal editors decide whether an article is fit for publication, needs minor or major revision, or should be rejected altogether.

Importance of peer review

The peer-review process has been considered a hallmark of producing good scientific research for over 300 years. It rules out false claims, lack of evidence, inconsistency in arguments, and other kinds of biases. The general consensus is that experts of a field are the most qualified to determine how the field advances, and to help improve the quality of research in a subject. 

While the final decision of publication is on the editor, peers play an important role in assessing the scientific validity of academic research.

The peer-review process

While the variables of the peer review process are different from journal to journal, it usually follows these steps: 

1. A researcher submits their paper to a prospective journal. 

2. The journal’s editorial team evaluates it to see if the research is relevant to the publication. 

3. Depending on how the editor’s review goes, the journal may

a. Accept the paper, which then goes for expert review. 

b. Reject the paper, with an option to resubmit after the researcher has made revisions. 

c. Reject the paper entirely. 

4. If your paper has been accepted, it will go through a round of peer review, usually comprising one to three experts in your field. 

5. Depending on how the research has been critiqued, you may have to revise your paper. 

6. Once revisions have been accepted, your paper is ready for publication. 

There are many variations of this process, and what applies to your paper depends on the subject ‌and journal guidelines.

These peers, also known as referees, then review your work. 

What do they look for? 

• Valid, reliable, and replicable research methods 
• A well-argued, comprehensive paper 
• Impact and contribution to the field of study 

Now that we’ve answered some of the most important questions about the peer review process, let’s explore the different types of peer review processes. 

Eight types of peer review processes 

Broadly speaking, there are two kinds of peer review processes: closed and open. In a closed peer review process, the identities of some or all parties involved are anonymous. On the other hand, open peer review processes encourage that the identities of reviewers and authors be known, in an effort to encourage transparency and accountability.

Within these two broader types, there are many systems of peer review used across journals and disciplines. Let’s take a look! 

1. Single blind review 

In a single blind review (or single-anonymized review), the author’s identity is known to the reviewers, while the reviewers’ identity is anonymous to the author. This is the most commonly practiced form of peer review. 

This kind of anonymity ensures that the reviewers can critique the work without the pressure of authors being able to respond to them personally. Ideally, this and having details about the authors will give them more context to work with. 

The flip side of this format is that knowing the author’s identity, affiliation, and research history may also result in a biased critique. Peers may be prone to bias based on an author’s gender identity, academic background, nationality, and so on. 

2. Double blind review 

In a double blind review (or double-anonymized review), the identities of both the reviewers and authors are unknown to each other. This form of peer review is common in social science and humanities journals. 

Double blind reviews ensure impartial review. It allows reviewers to judge papers based on the merit of the research and the ideas it poses, rather than the author and their affiliations.

But despite the anonymity, researchers and reviewers often may be able to identify each other, since they are likely to be from the same research work. Reviewers may also be able to identify authors based on writing style, the sources they cite, self-citations, and even the topic of research. 

3. Triple blind review 

In the triple-anonymized review system, the author’s identity is anonymous to both the reviewer and the journal editors (until the first round of reviews). Likewise, their identity is unknown to the author as well. This form of review is quite rare currently and is a fairly recent conversation within academia. 

While the triple blind review system is poised to reduce bias among all involved parties, it’s still possible for reviewers and editors to identify the author (just like in a double blind review. The bigger constraint is that the logistics of ensuring this level of anonymity are complex, often adding administrative hurdles and increasing publishing costs. 

4. Open peer review 

Open peer review is an umbrella term that encompasses review systems where the identities of the authors and their reviewers are known to each other. This can either be during the review process or after the paper has been published. 

In some cases, peer-reviewed journals may choose to publish the review alongside your article. Making the review publicly available encourages accountability and transparency among peers. Having open conversations about current research improves discourse and the overall quality of research produced in the subject. 

Despite its many advantages, open reviews are still fairly unpopular since many researchers are apprehensive about being identified for their review style. 

5. Transparent peer review 

This is a form of peer review in which the researcher’s identity is known to the reviewers, while the latter’s identity is anonymous. So far, it sounds like the single blind review, but what makes this transparent is that authors have a chance to know who their reviewers are, provided they agree to disclose their identity. They also have to sign a report stating so. 

If the article has been accepted for publication, the review is published anonymously with the article.

6. Transferable peer review

There are instances, in scientific circles, where a journal might reject a paper if it thinks the research is not relevant to their publication. For researchers, this is a step backward because they have to start all over again to find journals appropriate for their work, as well as format and revise their papers accordingly. 

The research community is increasingly exploring a form of peer review to make this process easier: the transferable peer review system. Under this system, a journal that deems your work unsuitable for publication may recommend you to a journal that’s more relevant to your field and much more likely to align with your research area. 

While this is a wonderful way to support researchers, this system presents a lot of logistical hurdles for the journal. Plus, there’s no guarantee that the second journal will publish your paper. That’s still on the merit of your research! 

7. Collaborative peer review 

The collaborative peer review model is also a fairly new system. As the name suggests, under this model, the author gets to discuss their research with their reviewer(s). The reviewers’ identities are usually anonymous, with both parties communicating via email or through a communication platform set up by the journal. 

This model ensures real-time feedback and exchange of notes between parties. There’s more scope for the researcher to receive in-depth feedback and make necessary revisions swiftly. The flip side of this model, however, is that it’s often logistically difficult for journals to invest the time, effort, and resources to hone the work of every researcher that comes their way.

8. Post-publication peer review 

On one level, all published research is liable to be under the scrutiny of the research community. It’s fair game, after all, and (more importantly) is expected to continuously live up to the quality of research produced in that field. 

But since academia is competitive and there’s constant pressure to publish work, the research community is also exploring a form of peer review ‌that keeps up with the rapid publication of papers. This is known as post-publication peer review (PPPR), where <strong&gt;peers can respond to a paper after it has been published. Reviews can be sent in by email, letters to the journal, blogs, social media, and discussion forums. 

Future trends in peer review

AI-assisted peer review and hybrid peer review models are two emerging trends in peer review. Let’s explore them in detail! 

1. AI-assisted peer review

Artificial intelligence (AI) tools can help automate and streamline certain aspects of the process, such as identifying potential reviewers, checking for plagiarism, and analyzing the quality and relevance of research. AI can also help reduce human biases and inconsistencies in peer review, leading to a more objective and reliable evaluation of scientific work.

2. Hybrid peer review models

A rise in hybrid models combining aspects of different peer review approaches is expected. For example, a journal might use open peer review for some manuscripts and traditional blind review for others, deciding the process according to the specific needs of the research.

This concludes our guide about the peer review process! The eight types of peer review in this article highlight the importance of this process. 

An important step you need to perform before the peer review is to edit and proofread your article. At PaperTrue, we provide professional editing and proofreading services to enhance your journal article. Our trained team can remove all language errors, enhance formatting, and check if the references are correctly cited. 

Explore our website to learn more about our services! 

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Tanvi

With a foundation in Life Sciences, Tanvi enjoys curating technical writing tips tailored for ESL students. When she's not translating complex concepts into bite-sized nuggets, she can be found playing with dogs or painting landscapes.