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• What Is Peer Review? | Types & Examples

What Is Peer Review? | Types & Examples

Published on December 17, 2021 by Tegan George . Revised on June 22, 2023.

Peer review, sometimes referred to as refereeing , is the process of evaluating submissions to an academic journal. Using strict criteria, a panel of reviewers in the same subject area decides whether to accept each submission for publication.

Peer-reviewed articles are considered a highly credible source due to the stringent process they go through before publication.

There are various types of peer review. The main difference between them is to what extent the authors, reviewers, and editors know each other’s identities. The most common types are:

• Single-blind review
• Double-blind review
• Triple-blind review

Collaborative review

Open review.

Relatedly, peer assessment is a process where your peers provide you with feedback on something you’ve written, based on a set of criteria or benchmarks from an instructor. They then give constructive feedback, compliments, or guidance to help you improve your draft.

Table of contents

What is the purpose of peer review, types of peer review, the peer review process, providing feedback to your peers, peer review example, advantages of peer review, criticisms of peer review, other interesting articles, frequently asked questions about peer reviews.

Many academic fields use peer review, largely to determine whether a manuscript is suitable for publication. Peer review enhances the credibility of the manuscript. For this reason, academic journals are among the most credible sources you can refer to.

However, peer review is also common in non-academic settings. The United Nations, the European Union, and many individual nations use peer review to evaluate grant applications. It is also widely used in medical and health-related fields as a teaching or quality-of-care measure.

Peer assessment is often used in the classroom as a pedagogical tool. Both receiving feedback and providing it are thought to enhance the learning process, helping students think critically and collaboratively.

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Depending on the journal, there are several types of peer review.

Single-blind peer review

The most common type of peer review is single-blind (or single anonymized) review . Here, the names of the reviewers are not known by the author.

While this gives the reviewers the ability to give feedback without the possibility of interference from the author, there has been substantial criticism of this method in the last few years. Many argue that single-blind reviewing can lead to poaching or intellectual theft or that anonymized comments cause reviewers to be too harsh.

Double-blind peer review

In double-blind (or double anonymized) review , both the author and the reviewers are anonymous.

Arguments for double-blind review highlight that this mitigates any risk of prejudice on the side of the reviewer, while protecting the nature of the process. In theory, it also leads to manuscripts being published on merit rather than on the reputation of the author.

Triple-blind peer review

While triple-blind (or triple anonymized) review —where the identities of the author, reviewers, and editors are all anonymized—does exist, it is difficult to carry out in practice.

Proponents of adopting triple-blind review for journal submissions argue that it minimizes potential conflicts of interest and biases. However, ensuring anonymity is logistically challenging, and current editing software is not always able to fully anonymize everyone involved in the process.

In collaborative review , authors and reviewers interact with each other directly throughout the process. However, the identity of the reviewer is not known to the author. This gives all parties the opportunity to resolve any inconsistencies or contradictions in real time, and provides them a rich forum for discussion. It can mitigate the need for multiple rounds of editing and minimize back-and-forth.

Collaborative review can be time- and resource-intensive for the journal, however. For these collaborations to occur, there has to be a set system in place, often a technological platform, with staff monitoring and fixing any bugs or glitches.

Lastly, in open review , all parties know each other’s identities throughout the process. Often, open review can also include feedback from a larger audience, such as an online forum, or reviewer feedback included as part of the final published product.

While many argue that greater transparency prevents plagiarism or unnecessary harshness, there is also concern about the quality of future scholarship if reviewers feel they have to censor their comments.

In general, the peer review process includes the following steps:

• First, the author submits the manuscript to the editor.
• Reject the manuscript and send it back to the author, or
• Send it onward to the selected peer reviewer(s)
• Next, the peer review process occurs. The reviewer provides feedback, addressing any major or minor issues with the manuscript, and gives their advice regarding what edits should be made.
• Lastly, the edited manuscript is sent back to the author. They input the edits and resubmit it to the editor for publication.

In an effort to be transparent, many journals are now disclosing who reviewed each article in the published product. There are also increasing opportunities for collaboration and feedback, with some journals allowing open communication between reviewers and authors.

It can seem daunting at first to conduct a peer review or peer assessment. If you’re not sure where to start, there are several best practices you can use.

Summarize the argument in your own words

Summarizing the main argument helps the author see how their argument is interpreted by readers, and gives you a jumping-off point for providing feedback. If you’re having trouble doing this, it’s a sign that the argument needs to be clearer, more concise, or worded differently.

If the author sees that you’ve interpreted their argument differently than they intended, they have an opportunity to address any misunderstandings when they get the manuscript back.

Separate your feedback into major and minor issues

It can be challenging to keep feedback organized. One strategy is to start out with any major issues and then flow into the more minor points. It’s often helpful to keep your feedback in a numbered list, so the author has concrete points to refer back to.

Major issues typically consist of any problems with the style, flow, or key points of the manuscript. Minor issues include spelling errors, citation errors, or other smaller, easy-to-apply feedback.

Tip: Try not to focus too much on the minor issues. If the manuscript has a lot of typos, consider making a note that the author should address spelling and grammar issues, rather than going through and fixing each one.

The best feedback you can provide is anything that helps them strengthen their argument or resolve major stylistic issues.

Give the type of feedback that you would like to receive

No one likes being criticized, and it can be difficult to give honest feedback without sounding overly harsh or critical. One strategy you can use here is the “compliment sandwich,” where you “sandwich” your constructive criticism between two compliments.

Be sure you are giving concrete, actionable feedback that will help the author submit a successful final draft. While you shouldn’t tell them exactly what they should do, your feedback should help them resolve any issues they may have overlooked.

As a rule of thumb, your feedback should be:

• Easy to understand
• Constructive

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Below is a brief annotated research example. You can view examples of peer feedback by hovering over the highlighted sections.

Influence of phone use on sleep

Studies show that teens from the US are getting less sleep than they were a decade ago (Johnson, 2019) . On average, teens only slept for 6 hours a night in 2021, compared to 8 hours a night in 2011. Johnson mentions several potential causes, such as increased anxiety, changed diets, and increased phone use.

The current study focuses on the effect phone use before bedtime has on the number of hours of sleep teens are getting.

For this study, a sample of 300 teens was recruited using social media, such as Facebook, Instagram, and Snapchat. The first week, all teens were allowed to use their phone the way they normally would, in order to obtain a baseline.

The sample was then divided into 3 groups:

• Group 1 was not allowed to use their phone before bedtime.
• Group 2 used their phone for 1 hour before bedtime.
• Group 3 used their phone for 3 hours before bedtime.

All participants were asked to go to sleep around 10 p.m. to control for variation in bedtime . In the morning, their Fitbit showed the number of hours they’d slept. They kept track of these numbers themselves for 1 week.

Two independent t tests were used in order to compare Group 1 and Group 2, and Group 1 and Group 3. The first t test showed no significant difference ( p > .05) between the number of hours for Group 1 ( M = 7.8, SD = 0.6) and Group 2 ( M = 7.0, SD = 0.8). The second t test showed a significant difference ( p < .01) between the average difference for Group 1 ( M = 7.8, SD = 0.6) and Group 3 ( M = 6.1, SD = 1.5).

This shows that teens sleep fewer hours a night if they use their phone for over an hour before bedtime, compared to teens who use their phone for 0 to 1 hours.

Peer review is an established and hallowed process in academia, dating back hundreds of years. It provides various fields of study with metrics, expectations, and guidance to ensure published work is consistent with predetermined standards.

• Protects the quality of published research

Peer review can stop obviously problematic, falsified, or otherwise untrustworthy research from being published. Any content that raises red flags for reviewers can be closely examined in the review stage, preventing plagiarized or duplicated research from being published.

• Gives you access to feedback from experts in your field

Peer review represents an excellent opportunity to get feedback from renowned experts in your field and to improve your writing through their feedback and guidance. Experts with knowledge about your subject matter can give you feedback on both style and content, and they may also suggest avenues for further research that you hadn’t yet considered.

• Helps you identify any weaknesses in your argument

Peer review acts as a first defense, helping you ensure your argument is clear and that there are no gaps, vague terms, or unanswered questions for readers who weren’t involved in the research process. This way, you’ll end up with a more robust, more cohesive article.

While peer review is a widely accepted metric for credibility, it’s not without its drawbacks.

• Reviewer bias

The more transparent double-blind system is not yet very common, which can lead to bias in reviewing. A common criticism is that an excellent paper by a new researcher may be declined, while an objectively lower-quality submission by an established researcher would be accepted.

• Delays in publication

The thoroughness of the peer review process can lead to significant delays in publishing time. Research that was current at the time of submission may not be as current by the time it’s published. There is also high risk of publication bias , where journals are more likely to publish studies with positive findings than studies with negative findings.

• Risk of human error

By its very nature, peer review carries a risk of human error. In particular, falsification often cannot be detected, given that reviewers would have to replicate entire experiments to ensure the validity of results.

If you want to know more about statistics , methodology , or research bias , make sure to check out some of our other articles with explanations and examples.

• Normal distribution
• Measures of central tendency
• Chi square tests
• Confidence interval
• Quartiles & Quantiles
• Cluster sampling
• Stratified sampling
• Thematic analysis
• Discourse analysis
• Cohort study
• Ethnography

Research bias

• Implicit bias
• Cognitive bias
• Conformity bias
• Hawthorne effect
• Availability heuristic
• Attrition bias
• Social desirability bias

Peer review is a process of evaluating submissions to an academic journal. Utilizing rigorous criteria, a panel of reviewers in the same subject area decide whether to accept each submission for publication. For this reason, academic journals are often considered among the most credible sources you can use in a research project– provided that the journal itself is trustworthy and well-regarded.

In general, the peer review process follows the following steps: 

• Reject the manuscript and send it back to author, or 
• Send it onward to the selected peer reviewer(s) 
• Next, the peer review process occurs. The reviewer provides feedback, addressing any major or minor issues with the manuscript, and gives their advice regarding what edits should be made. 
• Lastly, the edited manuscript is sent back to the author. They input the edits, and resubmit it to the editor for publication.

Peer review can stop obviously problematic, falsified, or otherwise untrustworthy research from being published. It also represents an excellent opportunity to get feedback from renowned experts in your field. It acts as a first defense, helping you ensure your argument is clear and that there are no gaps, vague terms, or unanswered questions for readers who weren’t involved in the research process.

Peer-reviewed articles are considered a highly credible source due to this stringent process they go through before publication.

Many academic fields use peer review , largely to determine whether a manuscript is suitable for publication. Peer review enhances the credibility of the published manuscript.

However, peer review is also common in non-academic settings. The United Nations, the European Union, and many individual nations use peer review to evaluate grant applications. It is also widely used in medical and health-related fields as a teaching or quality-of-care measure. 

A credible source should pass the CRAAP test  and follow these guidelines:

• The information should be up to date and current.
• The author and publication should be a trusted authority on the subject you are researching.
• The sources the author cited should be easy to find, clear, and unbiased.
• For a web source, the URL and layout should signify that it is trustworthy.

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Understanding Peer Review in Science

Peer review is an essential element of the scientific publishing process that helps ensure that research articles are evaluated, critiqued, and improved before release into the academic community. Take a look at the significance of peer review in scientific publications, the typical steps of the process, and and how to approach peer review if you are asked to assess a manuscript.

What Is Peer Review?

Peer review is the evaluation of work by peers, who are people with comparable experience and competency. Peers assess each others’ work in educational settings, in professional settings, and in the publishing world. The goal of peer review is improving quality, defining and maintaining standards, and helping people learn from one another.

In the context of scientific publication, peer review helps editors determine which submissions merit publication and improves the quality of manuscripts prior to their final release.

Types of Peer Review for Manuscripts

There are three main types of peer review:

• Single-blind review: The reviewers know the identities of the authors, but the authors do not know the identities of the reviewers.
• Double-blind review: Both the authors and reviewers remain anonymous to each other.
• Open peer review: The identities of both the authors and reviewers are disclosed, promoting transparency and collaboration.

There are advantages and disadvantages of each method. Anonymous reviews reduce bias but reduce collaboration, while open reviews are more transparent, but increase bias.

Key Elements of Peer Review

Proper selection of a peer group improves the outcome of the process:

• Expertise : Reviewers should possess adequate knowledge and experience in the relevant field to provide constructive feedback.
• Objectivity : Reviewers assess the manuscript impartially and without personal bias.
• Confidentiality : The peer review process maintains confidentiality to protect intellectual property and encourage honest feedback.
• Timeliness : Reviewers provide feedback within a reasonable timeframe to ensure timely publication.

Steps of the Peer Review Process

The typical peer review process for scientific publications involves the following steps:

• Submission : Authors submit their manuscript to a journal that aligns with their research topic.
• Editorial assessment : The journal editor examines the manuscript and determines whether or not it is suitable for publication. If it is not, the manuscript is rejected.
• Peer review : If it is suitable, the editor sends the article to peer reviewers who are experts in the relevant field.
• Reviewer feedback : Reviewers provide feedback, critique, and suggestions for improvement.
• Revision and resubmission : Authors address the feedback and make necessary revisions before resubmitting the manuscript.
• Final decision : The editor makes a final decision on whether to accept or reject the manuscript based on the revised version and reviewer comments.
• Publication : If accepted, the manuscript undergoes copyediting and formatting before being published in the journal.

Pros and Cons

While the goal of peer review is improving the quality of published research, the process isn’t without its drawbacks.

• Quality assurance : Peer review helps ensure the quality and reliability of published research.
• Error detection : The process identifies errors and flaws that the authors may have overlooked.
• Credibility : The scientific community generally considers peer-reviewed articles to be more credible.
• Professional development : Reviewers can learn from the work of others and enhance their own knowledge and understanding.
• Time-consuming : The peer review process can be lengthy, delaying the publication of potentially valuable research.
• Bias : Personal biases of reviews impact their evaluation of the manuscript.
• Inconsistency : Different reviewers may provide conflicting feedback, making it challenging for authors to address all concerns.
• Limited effectiveness : Peer review does not always detect significant errors or misconduct.
• Poaching : Some reviewers take an idea from a submission and gain publication before the authors of the original research.

Steps for Conducting Peer Review of an Article

Generally, an editor provides guidance when you are asked to provide peer review of a manuscript. Here are typical steps of the process.

• Accept the right assignment: Accept invitations to review articles that align with your area of expertise to ensure you can provide well-informed feedback.
• Manage your time: Allocate sufficient time to thoroughly read and evaluate the manuscript, while adhering to the journal’s deadline for providing feedback.
• Read the manuscript multiple times: First, read the manuscript for an overall understanding of the research. Then, read it more closely to assess the details, methodology, results, and conclusions.
• Evaluate the structure and organization: Check if the manuscript follows the journal’s guidelines and is structured logically, with clear headings, subheadings, and a coherent flow of information.
• Assess the quality of the research: Evaluate the research question, study design, methodology, data collection, analysis, and interpretation. Consider whether the methods are appropriate, the results are valid, and the conclusions are supported by the data.
• Examine the originality and relevance: Determine if the research offers new insights, builds on existing knowledge, and is relevant to the field.
• Check for clarity and consistency: Review the manuscript for clarity of writing, consistent terminology, and proper formatting of figures, tables, and references.
• Identify ethical issues: Look for potential ethical concerns, such as plagiarism, data fabrication, or conflicts of interest.
• Provide constructive feedback: Offer specific, actionable, and objective suggestions for improvement, highlighting both the strengths and weaknesses of the manuscript. Don’t be mean.
• Organize your review: Structure your review with an overview of your evaluation, followed by detailed comments and suggestions organized by section (e.g., introduction, methods, results, discussion, and conclusion).
• Be professional and respectful: Maintain a respectful tone in your feedback, avoiding personal criticism or derogatory language.
• Proofread your review: Before submitting your review, proofread it for typos, grammar, and clarity.
• Couzin-Frankel J (September 2013). “Biomedical publishing. Secretive and subjective, peer review proves resistant to study”. Science . 341 (6152): 1331. doi: 10.1126/science.341.6152.1331
• Lee, Carole J.; Sugimoto, Cassidy R.; Zhang, Guo; Cronin, Blaise (2013). “Bias in peer review”. Journal of the American Society for Information Science and Technology. 64 (1): 2–17. doi: 10.1002/asi.22784
• Slavov, Nikolai (2015). “Making the most of peer review”. eLife . 4: e12708. doi: 10.7554/eLife.12708
• Spier, Ray (2002). “The history of the peer-review process”. Trends in Biotechnology . 20 (8): 357–8. doi: 10.1016/S0167-7799(02)01985-6
• Squazzoni, Flaminio; Brezis, Elise; Marušić, Ana (2017). “Scientometrics of peer review”. Scientometrics . 113 (1): 501–502. doi: 10.1007/s11192-017-2518-4

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Peer review guidance: a primer for researchers

Olena zimba.

1 Department of Internal Medicine No. 2, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine

Armen Yuri Gasparyan

2 Departments of Rheumatology and Research and Development, Dudley Group NHS Foundation Trust (Teaching Trust of the University of Birmingham, UK), Russells Hall Hospital, Dudley, West Midlands, UK

The peer review process is essential for quality checks and validation of journal submissions. Although it has some limitations, including manipulations and biased and unfair evaluations, there is no other alternative to the system. Several peer review models are now practised, with public review being the most appropriate in view of the open science movement. Constructive reviewer comments are increasingly recognised as scholarly contributions which should meet certain ethics and reporting standards. The Publons platform, which is now part of the Web of Science Group (Clarivate Analytics), credits validated reviewer accomplishments and serves as an instrument for selecting and promoting the best reviewers. All authors with relevant profiles may act as reviewers. Adherence to research reporting standards and access to bibliographic databases are recommended to help reviewers draft evidence-based and detailed comments.

Introduction

The peer review process is essential for evaluating the quality of scholarly works, suggesting corrections, and learning from other authors’ mistakes. The principles of peer review are largely based on professionalism, eloquence, and collegiate attitude. As such, reviewing journal submissions is a privilege and responsibility for ‘elite’ research fellows who contribute to their professional societies and add value by voluntarily sharing their knowledge and experience.

Since the launch of the first academic periodicals back in 1665, the peer review has been mandatory for validating scientific facts, selecting influential works, and minimizing chances of publishing erroneous research reports [ 1 ]. Over the past centuries, peer review models have evolved from single-handed editorial evaluations to collegial discussions, with numerous strengths and inevitable limitations of each practised model [ 2 , 3 ]. With multiplication of periodicals and editorial management platforms, the reviewer pool has expanded and internationalized. Various sets of rules have been proposed to select skilled reviewers and employ globally acceptable tools and language styles [ 4 , 5 ].

In the era of digitization, the ethical dimension of the peer review has emerged, necessitating involvement of peers with full understanding of research and publication ethics to exclude unethical articles from the pool of evidence-based research and reviews [ 6 ]. In the time of the COVID-19 pandemic, some, if not most, journals face the unavailability of skilled reviewers, resulting in an unprecedented increase of articles without a history of peer review or those with surprisingly short evaluation timelines [ 7 ].

Editorial recommendations and the best reviewers

Guidance on peer review and selection of reviewers is currently available in the recommendations of global editorial associations which can be consulted by journal editors for updating their ethics statements and by research managers for crediting the evaluators. The International Committee on Medical Journal Editors (ICMJE) qualifies peer review as a continuation of the scientific process that should involve experts who are able to timely respond to reviewer invitations, submitting unbiased and constructive comments, and keeping confidentiality [ 8 ].

The reviewer roles and responsibilities are listed in the updated recommendations of the Council of Science Editors (CSE) [ 9 ] where ethical conduct is viewed as a premise of the quality evaluations. The Committee on Publication Ethics (COPE) further emphasizes editorial strategies that ensure transparent and unbiased reviewer evaluations by trained professionals [ 10 ]. Finally, the World Association of Medical Editors (WAME) prioritizes selecting the best reviewers with validated profiles to avoid substandard or fraudulent reviewer comments [ 11 ]. Accordingly, the Sarajevo Declaration on Integrity and Visibility of Scholarly Publications encourages reviewers to register with the Open Researcher and Contributor ID (ORCID) platform to validate and publicize their scholarly activities [ 12 ].

Although the best reviewer criteria are not listed in the editorial recommendations, it is apparent that the manuscript evaluators should be active researchers with extensive experience in the subject matter and an impressive list of relevant and recent publications [ 13 ]. All authors embarking on an academic career and publishing articles with active contact details can be involved in the evaluation of others’ scholarly works [ 14 ]. Ideally, the reviewers should be peers of the manuscript authors with equal scholarly ranks and credentials.

However, journal editors may employ schemes that engage junior research fellows as co-reviewers along with their mentors and senior fellows [ 15 ]. Such a scheme is successfully practised within the framework of the Emerging EULAR (European League Against Rheumatism) Network (EMEUNET) where seasoned authors (mentors) train ongoing researchers (mentees) how to evaluate submissions to the top rheumatology journals and select the best evaluators for regular contributors to these journals [ 16 ].

The awareness of the EQUATOR Network reporting standards may help the reviewers to evaluate methodology and suggest related revisions. Statistical skills help the reviewers to detect basic mistakes and suggest additional analyses. For example, scanning data presentation and revealing mistakes in the presentation of means and standard deviations often prompt re-analyses of distributions and replacement of parametric tests with non-parametric ones [ 17 , 18 ].

Constructive reviewer comments

The main goal of the peer review is to support authors in their attempt to publish ethically sound and professionally validated works that may attract readers’ attention and positively influence healthcare research and practice. As such, an optimal reviewer comment has to comprehensively examine all parts of the research and review work ( Table I ). The best reviewers are viewed as contributors who guide authors on how to correct mistakes, discuss study limitations, and highlight its strengths [ 19 ].

Structure of a reviewer comment to be forwarded to authors

Some of the currently practised review models are well positioned to help authors reveal and correct their mistakes at pre- or post-publication stages ( Table II ). The global move toward open science is particularly instrumental for increasing the quality and transparency of reviewer contributions.

Advantages and disadvantages of common manuscript evaluation models

Since there are no universally acceptable criteria for selecting reviewers and structuring their comments, instructions of all peer-reviewed journal should specify priorities, models, and expected review outcomes [ 20 ]. Monitoring and reporting average peer review timelines is also required to encourage timely evaluations and avoid delays. Depending on journal policies and article types, the first round of peer review may last from a few days to a few weeks. The fast-track review (up to 3 days) is practised by some top journals which process clinical trial reports and other priority items.

In exceptional cases, reviewer contributions may result in substantive changes, appreciated by authors in the official acknowledgments. In most cases, however, reviewers should avoid engaging in the authors’ research and writing. They should refrain from instructing the authors on additional tests and data collection as these may delay publication of original submissions with conclusive results.

Established publishers often employ advanced editorial management systems that support reviewers by providing instantaneous access to the review instructions, online structured forms, and some bibliographic databases. Such support enables drafting of evidence-based comments that examine the novelty, ethical soundness, and implications of the reviewed manuscripts [ 21 ].

Encouraging reviewers to submit their recommendations on manuscript acceptance/rejection and related editorial tasks is now a common practice. Skilled reviewers may prompt the editors to reject or transfer manuscripts which fall outside the journal scope, perform additional ethics checks, and minimize chances of publishing erroneous and unethical articles. They may also raise concerns over the editorial strategies in their comments to the editors.

Since reviewer and editor roles are distinct, reviewer recommendations are aimed at helping editors, but not at replacing their decision-making functions. The final decisions rest with handling editors. Handling editors weigh not only reviewer comments, but also priorities related to article types and geographic origins, space limitations in certain periods, and envisaged influence in terms of social media attention and citations. This is why rejections of even flawless manuscripts are likely at early rounds of internal and external evaluations across most peer-reviewed journals.

Reviewers are often requested to comment on language correctness and overall readability of the evaluated manuscripts. Given the wide availability of in-house and external editing services, reviewer comments on language mistakes and typos are categorized as minor. At the same time, non-Anglophone experts’ poor language skills often exclude them from contributing to the peer review in most influential journals [ 22 ]. Comments should be properly edited to convey messages in positive or neutral tones, express ideas of varying degrees of certainty, and present logical order of words, sentences, and paragraphs [ 23 , 24 ]. Consulting linguists on communication culture, passing advanced language courses, and honing commenting skills may increase the overall quality and appeal of the reviewer accomplishments [ 5 , 25 ].

Peer reviewer credits

Various crediting mechanisms have been proposed to motivate reviewers and maintain the integrity of science communication [ 26 ]. Annual reviewer acknowledgments are widely practised for naming manuscript evaluators and appreciating their scholarly contributions. Given the need to weigh reviewer contributions, some journal editors distinguish ‘elite’ reviewers with numerous evaluations and award those with timely and outstanding accomplishments [ 27 ]. Such targeted recognition ensures ethical soundness of the peer review and facilitates promotion of the best candidates for grant funding and academic job appointments [ 28 ].

Also, large publishers and learned societies issue certificates of excellence in reviewing which may include Continuing Professional Development (CPD) points [ 29 ]. Finally, an entirely new crediting mechanism is proposed to award bonus points to active reviewers who may collect, transfer, and use these points to discount gold open-access charges within the publisher consortia [ 30 ].

With the launch of Publons ( http://publons.com/ ) and its integration with Web of Science Group (Clarivate Analytics), reviewer recognition has become a matter of scientific prestige. Reviewers can now freely open their Publons accounts and record their contributions to online journals with Digital Object Identifiers (DOI). Journal editors, in turn, may generate official reviewer acknowledgments and encourage reviewers to forward them to Publons for building up individual reviewer and journal profiles. All published articles maintain e-links to their review records and post-publication promotion on social media, allowing the reviewers to continuously track expert evaluations and comments. A paid-up partnership is also available to journals and publishers for automatically transferring peer-review records to Publons upon mutually acceptable arrangements.

Listing reviewer accomplishments on an individual Publons profile showcases scholarly contributions of the account holder. The reviewer accomplishments placed next to the account holders’ own articles and editorial accomplishments point to the diversity of scholarly contributions. Researchers may establish links between their Publons and ORCID accounts to further benefit from complementary services of both platforms. Publons Academy ( https://publons.com/community/academy/ ) additionally offers an online training course to novice researchers who may improve their reviewing skills under the guidance of experienced mentors and journal editors. Finally, journal editors may conduct searches through the Publons platform to select the best reviewers across academic disciplines.

Peer review ethics

Prior to accepting reviewer invitations, scholars need to weigh a number of factors which may compromise their evaluations. First of all, they are required to accept the reviewer invitations if they are capable of timely submitting their comments. Peer review timelines depend on article type and vary widely across journals. The rules of transparent publishing necessitate recording manuscript submission and acceptance dates in article footnotes to inform readers of the evaluation speed and to help investigators in the event of multiple unethical submissions. Timely reviewer accomplishments often enable fast publication of valuable works with positive implications for healthcare. Unjustifiably long peer review, on the contrary, delays dissemination of influential reports and results in ethical misconduct, such as plagiarism of a manuscript under evaluation [ 31 ].

In the times of proliferation of open-access journals relying on article processing charges, unjustifiably short review may point to the absence of quality evaluation and apparently ‘predatory’ publishing practice [ 32 , 33 ]. Authors when choosing their target journals should take into account the peer review strategy and associated timelines to avoid substandard periodicals.

Reviewer primary interests (unbiased evaluation of manuscripts) may come into conflict with secondary interests (promotion of their own scholarly works), necessitating disclosures by filling in related parts in the online reviewer window or uploading the ICMJE conflict of interest forms. Biomedical reviewers, who are directly or indirectly supported by the pharmaceutical industry, may encounter conflicts while evaluating drug research. Such instances require explicit disclosures of conflicts and/or rejections of reviewer invitations.

Journal editors are obliged to employ mechanisms for disclosing reviewer financial and non-financial conflicts of interest to avoid processing of biased comments [ 34 ]. They should also cautiously process negative comments that oppose dissenting, but still valid, scientific ideas [ 35 ]. Reviewer conflicts that stem from academic activities in a competitive environment may introduce biases, resulting in unfair rejections of manuscripts with opposing concepts, results, and interpretations. The same academic conflicts may lead to coercive reviewer self-citations, forcing authors to incorporate suggested reviewer references or face negative feedback and an unjustified rejection [ 36 ]. Notably, several publisher investigations have demonstrated a global scale of such misconduct, involving some highly cited researchers and top scientific journals [ 37 ].

Fake peer review, an extreme example of conflict of interest, is another form of misconduct that has surfaced in the time of mass proliferation of gold open-access journals and publication of articles without quality checks [ 38 ]. Fake reviews are generated by manipulating authors and commercial editing agencies with full access to their own manuscripts and peer review evaluations in the journal editorial management systems. The sole aim of these reviews is to break the manuscript evaluation process and to pave the way for publication of pseudoscientific articles. Authors of these articles are often supported by funds intended for the growth of science in non-Anglophone countries [ 39 ]. Iranian and Chinese authors are often caught submitting fake reviews, resulting in mass retractions by large publishers [ 38 ]. Several suggestions have been made to overcome this issue, with assigning independent reviewers and requesting their ORCID IDs viewed as the most practical options [ 40 ].

Conclusions

The peer review process is regulated by publishers and editors, enforcing updated global editorial recommendations. Selecting the best reviewers and providing authors with constructive comments may improve the quality of published articles. Reviewers are selected in view of their professional backgrounds and skills in research reporting, statistics, ethics, and language. Quality reviewer comments attract superior submissions and add to the journal’s scientific prestige [ 41 ].

In the era of digitization and open science, various online tools and platforms are available to upgrade the peer review and credit experts for their scholarly contributions. With its links to the ORCID platform and social media channels, Publons now offers the optimal model for crediting and keeping track of the best and most active reviewers. Publons Academy additionally offers online training for novice researchers who may benefit from the experience of their mentoring editors. Overall, reviewer training in how to evaluate journal submissions and avoid related misconduct is an important process, which some indexed journals are experimenting with [ 42 ].

The timelines and rigour of the peer review may change during the current pandemic. However, journal editors should mobilize their resources to avoid publication of unchecked and misleading reports. Additional efforts are required to monitor published contents and encourage readers to post their comments on publishers’ online platforms (blogs) and other social media channels [ 43 , 44 ].

The authors declare no conflict of interest.

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What is peer review?

Reviewers play a pivotal role in scholarly publishing. The peer review system exists to validate academic work, helps to improve the quality of published research, and increases networking possibilities within research communities. Despite criticisms, peer review is still the only widely accepted method for research validation and has continued successfully with relatively minor changes for some 350 years.

Elsevier relies on the peer review process to uphold the quality and validity of individual articles and the journals that publish them.

Peer review has been a formal part of scientific communication since the first scientific journals appeared more than 300 years ago. The Philosophical Transactions opens in new tab/window of the Royal Society is thought to be the first journal to formalize the peer review process opens in new tab/window under the editorship of Henry Oldenburg (1618- 1677).

Despite many criticisms about the integrity of peer review, the majority of the research community still believes peer review is the best form of scientific evaluation. This opinion was endorsed by the outcome of a survey Elsevier and Sense About Science conducted in 2009 opens in new tab/window and has since been further confirmed by other publisher and scholarly organization surveys. Furthermore, a  2015 survey by the Publishing Research Consortium opens in new tab/window , saw 82% of researchers agreeing that “without peer review there is no control in scientific communication.”

To learn more about peer review, visit Elsevier’s free e-learning platform  Researcher Academy opens in new tab/window and see our resources below.

The peer review process

Types of peer review.

Peer review comes in different flavours. Each model has its own advantages and disadvantages, and often one type of review will be preferred by a subject community. Before submitting or reviewing a paper, you must therefore check which type is employed by the journal so you are aware of the respective rules. In case of questions regarding the peer review model employed by the journal for which you have been invited to review, consult the journal’s homepage or contact the editorial office directly.  

Single anonymized review

In this type of review, the names of the reviewers are hidden from the author. This is the traditional method of reviewing and is the most common type by far. Points to consider regarding single anonymized review include:

Reviewer anonymity allows for impartial decisions, as the reviewers will not be influenced by potential criticism from the authors.

Authors may be concerned that reviewers in their field could delay publication, giving the reviewers a chance to publish first.

Reviewers may use their anonymity as justification for being unnecessarily critical or harsh when commenting on the authors’ work.

Double anonymized review

Both the reviewer and the author are anonymous in this model. Some advantages of this model are listed below.

Author anonymity limits reviewer bias, such as on author's gender, country of origin, academic status, or previous publication history.

Articles written by prestigious or renowned authors are considered based on the content of their papers, rather than their reputation.

But bear in mind that despite the above, reviewers can often identify the author through their writing style, subject matter, or self-citation – it is exceedingly difficult to guarantee total author anonymity. More information for authors can be found in our  double-anonymized peer review guidelines .

Triple anonymized review

With triple anonymized review, reviewers are anonymous to the author, and the author's identity is unknown to both the reviewers and the editor. Articles are anonymized at the submission stage and are handled in a way to minimize any potential bias towards the authors. However, it should be noted that: 

The complexities involved with anonymizing articles/authors to this level are considerable.

As with double anonymized review, there is still a possibility for the editor and/or reviewers to correctly identify the author(s) from their writing style, subject matter, citation patterns, or other methodologies.

Open review

Open peer review is an umbrella term for many different models aiming at greater transparency during and after the peer review process. The most common definition of open review is when both the reviewer and author are known to each other during the peer review process. Other types of open peer review consist of:

Publication of reviewers’ names on the article page 

Publication of peer review reports alongside the article, either signed or anonymous 

Publication of peer review reports (signed or anonymous) with authors’ and editors’ responses alongside the article 

Publication of the paper after pre-checks and opening a discussion forum to the community who can then comment (named or anonymous) on the article 

Many believe this is the best way to prevent malicious comments, stop plagiarism, prevent reviewers from following their own agenda, and encourage open, honest reviewing. Others see open review as a less honest process, in which politeness or fear of retribution may cause a reviewer to withhold or tone down criticism. For three years, five Elsevier journals experimented with publication of peer review reports (signed or anonymous) as articles alongside the accepted paper on ScienceDirect ( example opens in new tab/window ).

Read more about the experiment

More transparent peer review

Transparency is the key to trust in peer review and as such there is an increasing call towards more  transparency around the peer review process . In an effort to promote transparency in the peer review process, many Elsevier journals therefore publish the name of the handling editor of the published paper on ScienceDirect. Some journals also provide details about the number of reviewers who reviewed the article before acceptance. Furthermore, in order to provide updates and feedback to reviewers, most Elsevier journals inform reviewers about the editor’s decision and their peers’ recommendations. 

Article transfer service: sharing reviewer comments

Elsevier authors may be invited to  transfer  their article submission from one journal to another for free if their initial submission was not successful. 

As a referee, your review report (including all comments to the author and editor) will be transferred to the destination journal, along with the manuscript. The main benefit is that reviewers are not asked to review the same manuscript several times for different journals. 

Tools & resources

Elsevier researcher academy modules.

The certified peer reviewer course opens in new tab/window

Transparency in peer review opens in new tab/window

Reviewers’ Update articles

Peer review using today’s technology

Lifting the lid on publishing peer review reports: an interview with Bahar Mehmani and Flaminio Squazzoni

How face-to-face peer review can benefit authors and journals alike

Innovation in peer review: introducing “volunpeers”

Results masked review: peer review without publication bias

Interesting reads

"Is Peer Review in Crisis?" Perspectives in Publishing No 2, August 2004, by Adrian Mulligan opens in new tab/window

“The history of the peer-review process” Trends in Biotechnology, 2002, by Ray Spier opens in new tab/window

Publishing Research Consortium Peer review survey . 2015. Elsevier; 2015 

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Articles: Finding (and Identifying) Peer-Reviewed Articles: What is Peer Review?

• What is Peer Review?
• Finding Peer Reviewed Articles
• Databases That Can Determine Peer Review

Peer Review in 3 Minutes

What is "Peer-Review"?

What are they.

Scholarly articles are papers that describe a research study. 

Why are scholarly articles useful?

They report original research projects that have been reviewed by other experts before they are accepted for publication, so you can reasonably be assured that they contain valid information. 

How do you identify scholarly or peer-reviewed articles?

• They are usually fairly lengthy - most likely at least 7-10 pages
• The authors and their credentials should be identified, at least the company or university where the author is employed
• There is usually a list of References or Works Cited at the end of the paper, listing the sources that the authors used in their research

How do you find them? 

Some of the library's databases contain scholarly articles, either exclusively or in combination with other types of articles. 

Google Scholar is another option for searching for scholarly articles. 

Know the Difference Between Scholarly and Popular Journals/Magazines

Peer reviewed articles are found in scholarly journals.  The checklist below can help you determine if what you are looking at is peer reviewed or scholarly.

• Both kinds of journals and magazines can be useful sources of information.
• Popular magazines and newspapers are good for overviews, recent news, first-person accounts, and opinions about a topic.
• Scholarly journals, often called scientific or peer-reviewed journals, are good sources of actual studies or research conducted about a particular topic. They go through a process of review by experts, so the information is usually highly reliable.

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What Is Peer Review and Why Is It Important?

It’s one of the major cornerstones of the academic process and critical to maintaining rigorous quality standards for research papers. Whichever side of the peer review process you’re on, we want to help you understand the steps involved.

This post is part of a series that provides practical information and resources for authors and editors.

Peer review – the evaluation of academic research by other experts in the same field – has been used by the scientific community as a method of ensuring novelty and quality of research for more than 300 years. It is a testament to the power of peer review that a scientific hypothesis or statement presented to the world is largely ignored by the scholarly community unless it is first published in a peer-reviewed journal.

It is also safe to say that peer review is a critical element of the scholarly publication process and one of the major cornerstones of the academic process. It acts as a filter, ensuring that research is properly verified before being published. And it arguably improves the quality of the research, as the rigorous review by like-minded experts helps to refine or emphasise key points and correct inadvertent errors.

Ideally, this process encourages authors to meet the accepted standards of their discipline and in turn reduces the dissemination of irrelevant findings, unwarranted claims, unacceptable interpretations, and personal views.

If you are a researcher, you will come across peer review many times in your career. But not every part of the process might be clear to you yet. So, let’s have a look together!

Types of Peer Review

Peer review comes in many different forms. With single-blind peer review , the names of the reviewers are hidden from the authors, while double-blind peer review , both reviewers and authors remain anonymous. Then, there is open peer review , a term which offers more than one interpretation nowadays.

Open peer review can simply mean that reviewer and author identities are revealed to each other. It can also mean that a journal makes the reviewers’ reports and author replies of published papers publicly available (anonymized or not). The “open” in open peer review can even be a call for participation, where fellow researchers are invited to proactively comment on a freely accessible pre-print article. The latter two options are not yet widely used, but the Open Science movement, which strives for more transparency in scientific publishing, has been giving them a strong push over the last years.

If you are unsure about what kind of peer review a specific journal conducts, check out its instructions for authors and/or their editorial policy on the journal’s home page.

Why Should I Even Review?

To answer that question, many reviewers would probably reply that it simply is their “academic duty” – a natural part of academia, an important mechanism to monitor the quality of published research in their field. This is of course why the peer-review system was developed in the first place – by academia rather than the publishers – but there are also benefits.

Are you looking for the right place to publish your paper? Find out here whether a De Gruyter journal might be the right fit.

Besides a general interest in the field, reviewing also helps researchers keep up-to-date with the latest developments. They get to know about new research before everyone else does. It might help with their own research and/or stimulate new ideas. On top of that, reviewing builds relationships with prestigious journals and journal editors.

Clearly, reviewing is also crucial for the development of a scientific career, especially in the early stages. Relatively new services like Publons and ORCID Reviewer Recognition can support reviewers in getting credit for their efforts and making their contributions more visible to the wider community.

The Fundamentals of Reviewing

You have received an invitation to review? Before agreeing to do so, there are three pertinent questions you should ask yourself:

• Does the article you are being asked to review match your expertise?
• Do you have time to review the paper?
• Are there any potential conflicts of interest (e.g. of financial or personal nature)?

If you feel like you cannot handle the review for whatever reason, it is okay to decline. If you can think of a colleague who would be well suited for the topic, even better – suggest them to the journal’s editorial office.

But let’s assume that you have accepted the request. Here are some general things to keep in mind:

Please be aware that reviewer reports provide advice for editors to assist them in reaching a decision on a submitted paper. The final decision concerning a manuscript does not lie with you, but ultimately with the editor. It’s your expert guidance that is being sought.

Reviewing also needs to be conducted confidentially . The article you have been asked to review, including supplementary material, must never be disclosed to a third party. In the traditional single- or double-blind peer review process, your own anonymity will also be strictly preserved. Therefore, you should not communicate directly with the authors.

When writing a review, it is important to keep the journal’s guidelines in mind and to work along the building blocks of a manuscript (typically: abstract, introduction, methods, results, discussion, conclusion, references, tables, figures).

After initial receipt of the manuscript, you will be asked to supply your feedback within a specified period (usually 2-4 weeks). If at some point you notice that you are running out of time, get in touch with the editorial office as soon as you can and ask whether an extension is possible.

Some More Advice from a Journal Editor

• Be critical and constructive. An editor will find it easier to overturn very critical, unconstructive comments than to overturn favourable comments.
• Justify and specify all criticisms. Make specific references to the text of the paper (use line numbers!) or to published literature. Vague criticisms are unhelpful.
• Don’t repeat information from the paper , for example, the title and authors names, as this information already appears elsewhere in the review form.
• Check the aims and scope. This will help ensure that your comments are in accordance with journal policy and can be found on its home page.
• Give a clear recommendation . Do not put “I will leave the decision to the editor” in your reply, unless you are genuinely unsure of your recommendation.
• Number your comments. This makes it easy for authors to easily refer to them.
• Be careful not to identify yourself. Check, for example, the file name of your report if you submit it as a Word file.

Sticking to these rules will make the author’s life and that of the editors much easier!

Explore new perspectives on peer review in this collection of blog posts published during Peer Review Week 2021

[Title image by AndreyPopov/iStock/Getty Images Plus

David Sleeman

David Sleeman worked as a Senior Journals Manager in the field of Physical Sciences at De Gruyter.

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Types of peer review.

Peer review is “a process where scientists (“peers”) evaluate the quality of other scientists’ work. By doing this, they aim to ensure the work is rigorous, coherent, uses past research and adds to what we already know.” This quote comes from an explainer on The Conversation, which you can read here . 

Peer review brings academic research to publication in the following ways:

• Evaluation – Peer reviewing research helps publications select the highest quality articles.
• Integrity – Peer review ensures the integrity of the publishing process and the scholarly record.
• Quality – The filtering process and revision advice offered by verified experts within the academic field improves the quality of the final article, as well as providing the author with new insights into their research.

Types of peer review

• Single-anonymized  – The name of the reviewer is hidden from the author.
• Double-anonymized  – Names are hidden from reviewers and authors.
• Triple-anonymized  – Names are hidden from authors, reviewers, and the publication’s editor.
• Open peer review – At Sage we offer open peer review on some journals through our Transparent Peer Review program , whereby reviews are published alongside articles. The names of the reviewers may also be published, depending on the reviewers’ preference.
• Post publication peer review  – This involves an ongoing discussion of the research conducted via an open forum between the scientific community. It is the least common type of peer review and is not appropriate in all fields.

To learn more about the different types of peer review, see page 14 of Peer Review: The Nuts and Bolts of Peer Review , from Sense about Science.

A full list of Sage’s journals can be found here . Each journal will have its own set of instructions and submission guidelines for authors, so please double check the manuscript submission guidelines of the journal you are reviewing for in order to ensure that you understand the method of peer review being used.

• Journal Author Gateway
• Journal Editor Gateway
• Transparent Peer Review
• How to Review Articles
• Using Sage Track
• Peer Review Ethics
• Resources for Reviewers
• Reviewer Rewards
• Ethics & Responsibility
• Sage Editorial Policies
• Publication Ethics Policies
• Sage Chinese Author Gateway 中国作者资源

What is peer review?

From a publisher’s perspective, peer review functions as a filter for content, directing better quality articles to better quality journals and so creating journal brands.

Running articles through the process of peer review adds value to them. For this reason publishers need to make sure that peer review is robust.

Editor Feedback

"Pointing out the specifics about flaws in the paper’s structure is paramount. Are methods valid, is data clearly presented, and are conclusions supported by data?” (Editor feedback)

“If an editor can read your comments and understand clearly the basis for your recommendation, then you have written a helpful review.” (Editor feedback)

Peer Review at Its Best

What peer review does best is improve the quality of published papers by motivating authors to submit good quality work – and helping to improve that work through the peer review process. 

In fact, 90% of researchers feel that peer review improves the quality of their published paper (University of Tennessee and CIBER Research Ltd, 2013).

What the Critics Say

The peer review system is not without criticism. Studies show that even after peer review, some articles still contain inaccuracies and demonstrate that most rejected papers will go on to be published somewhere else.

However, these criticisms should be understood within the context of peer review as a human activity. The occasional errors of peer review are not reasons for abandoning the process altogether – the mistakes would be worse without it.

Improving Effectiveness

Some of the ways in which Wiley is seeking to improve the efficiency of the process, include:

• Reducing the amount of repeat reviewing by innovating around transferable peer review
• Providing training and best practice guidance to peer reviewers
• Improving recognition of the contribution made by reviewers

Visit our Peer Review Process and Types of Peer Review pages for additional detailed information on peer review.

Transparency in Peer Review

Wiley is committed to increasing transparency in peer review, increasing accountability for the peer review process and giving recognition to the work of peer reviewers and editors. We are also actively exploring other peer review models to give researchers the options that suit them and their communities.

Special Issues

Special Issues are subject to extensive review, during which journal Editors or Editorial Board input is solicited for each proposal. Our approval process includes an assessment of the rationale and scope of the proposed topic(s), and the expertise of Guest Editors, if any are involved. Special Issue articles must follow the same policies as described in the journal's Author Guidelines.

Editor/Editorial Board papers

Papers authored by Editors or Editorial Board members of the title are sent to Editors that are unaffiliated with the author or institution and monitored carefully to ensure there is no peer review bias.

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Explore and join reviewer mentorship programs offered by various APA journals.

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Peer review is an integral part of science and a valuable contribution to our field. Browse these resources and consider joining the community of APA reviewers.

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Publons is a service that provides instant recognition for peer review and enables APA reviewers and action editors to maintain a verified record of their contributions for promotion and funding applications.

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The Proposal & Award Policies & Procedures Guide (PAPPG) is the source for information about NSF's proposal and award process. Each version of the PAPPG applies to all proposals or applications submitted while that version is effective.

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NIH resources about the regulations and processes that govern peer review, including management of conflicts of interest, applicant and reviewer responsibilities in maintaining the integrity in peer review, appeals, and more.

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What Do You Mean by Peer Reviewed Sources?

(Source: NCSU Libraries)

What's so great about peer review?

Peer reviewed articles are often considered the most reliable and reputable sources in that field of study. Peer reviewed articles have undergone review (hence the "peer-review") by fellow experts in that field, as well as an editorial review process. The purpose of this is to ensure that, as much as possible, the finished product meets the standards of the field. 

Peer reviewed publications are one of the main ways researchers communicate with each other. 

Most library databases have features to help you discover articles from scholarly journals. Most articles from scholarly journals have gone through the peer review process. Many scholarly journals will also publish book reviews or start off with an editorial, which are not peer reviewed - so don't be tricked!

So that means I can turn my brain off, right?

Nope! You still need to engage with what you find. Are there additional scholarly sources with research that supports the source you've found, or have you encountered an outlier in the research? Have others been able to replicate the results of the research? Is the information old and outdated? Was this study on toothpaste (for example) funded by Colgate? 

You're engaging with the research - ultimately, you decide what belongs in your project, and what doesn't. You get to decide if a source is relevant or not. It's a lot of responsibility - but it's a lot of authority, too.

Understanding Types of Sources

• Popular vs. Scholarly
• Reading Scholarly Articles
• Check Yourself!

Popular vs. scholarly articles.

When looking for articles to use in your assignment, you should realize that there is a difference between "popular" and "scholarly" articles.

Popular  sources, such as newspapers and magazines, are written by journalists or others for general readers (for example, Time, Rolling Stone, and National Geographic).

Scholarly  sources are written for the academic community, including experts and students, on topics that are typically footnoted and based on research (for example, American Literature or New England Review). Scholarly journals are sometimes referred to as "peer-reviewed," "refereed" or "academic."

How do you find scholarly or "peer-reviewed" journal articles?

The option to select  scholarly or peer-reviewed articles is typically available on the search page of each database.  Just check the box or select the option . You can also search Ulrich's Periodical Directory  to see if the journal is Refereed / Peer-reviewed.  

Popular Sources (Magazines & Newspapers) Inform and entertain the general public.

• Are often written by journalists or professional writers for a general audience
• Use language easily understood by general readers
• Rarely give full citations for sources
• Written for the general public
• Tend to be shorter than journal articles

Scholarly or Academic Sources (Journals & Scholarly Books) Disseminate research and academic discussion among professionals in a discipline. 

• Are written by and for faculty, researchers or scholars (chemists, historians, doctors, artists, etc.)
• Uses scholarly or technical language
• Tend to be longer articles about research
• Include full citations for sources 
• Are often refereed or peer reviewed (articles are reviewed by an editor and other specialists before being accepted for publication)
• Publications may include book reviews and editorials which are not considered scholarly articles

Trade Publications Neither scholarly or popular sources, but could be a combination of both. Allows practitioners in specific industries to share market and production information that improves their businesses.

• Not peer reviewed. Usually written by people in the field or with subject expertise
• Shorter articles that are practical
• Provides information about current events and trends 

What might you find in a scholarly article?

• Title:  what the article is about
• Authors and affiliations:  the writer of the article and the professional affiliations. The credentials may appear below the name or in a footnote.
• Abstract: brief summary of the article. Gives you a general understanding  before you read the whole thing.
• Introduction: general overview of the research topic or problem
• Literature Review: what others have found on the same topic
• Methods:  information about how the authors conducted their research
• Results: key findings of the author's research
• Discussion/Conclusion: summary of the results or findings
• References: Citations to publications by other authors mentioned in the article
• Anatomy of a Scholarly Article This tutorial from the NCSU Libraries provides an interactive module for learning about the unique structure and elements of many scholarly articles.

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Evaluating Resources: Peer Review

What is peer review.

The term peer review can be confusing, since in some of your courses you may be asked to review the work of your peers. When we talk about peer-reviewed journal articles, this has nothing to do with your peers!

Peer-reviewed journals, also called refereed journals, are journals that use a specific scholarly review process to try to ensure the accuracy and reliability of published articles. When an article is submitted to a peer-reviewed journal for publication, the journal sends the article to other scholars/experts in that field and has them review the article for accuracy and reliability.

Find out more about peer review with our Peer Review Guide:

• Peer Review Guide

Types of peer review

Single blind.

In this process, the names of the reviewers are not known to the author(s). The reviewers do know the name of the author(s).

Double blind

Here, neither reviewers or authors know each other's names.

In the open review process, both reviewers and authors know each other's names.

What about editorial review?

Journals also use an editorial review process. This is not the same as peer review. In an editorial review process an article is evaluated for style guidelines and for clarity. Reviewers here do not look at technical accuracy or errors in data or methodology, but instead look at grammar, style, and whether an article is well written.

What is the difference between scholarly and peer review?

Not all scholarly journals are peer reviewed, but all peer-reviewed journals are scholarly.

• Things that are written for a scholarly or academic audience are considered scholarly writing.
• Peer-reviewed journals are a part of the larger category of scholarly writing.
• Scholarly writing includes many resources that are not peer reviewed, such as books, textbooks, and dissertations.

Scholarly writing does not come with a label that says scholarly . You will need to evaluate the resource to see if it is

• aimed at a scholarly audience
• reporting research, theories or other types of information important to scholars
• documenting and citing sources used to help authenticate the research done

The standard peer review process only applies to journals. While scholarly writing has certainly been edited and reviewed, peer review is a specific process only used by peer-reviewed journals. Books and dissertations may be scholarly, but are not considered peer reviewed.

Check out Select the Right Source for help with what kinds of resources are appropriate for discussion posts, assignments, projects, and more:

• Select the Right Source

How do I locate or verify peer-reviewed articles?

The peer review process is initiated by the journal publisher before an article is even published. Nowhere in the article will it tell you whether or not the article has gone through a peer review process.

You can locate peer-reviewed articles in the Library databases, typically by checking a limiter box.

• Quick Answer: How do I find scholarly, peer reviewed journal articles?

You can verify whether a journal uses a peer review process by using Ulrich's Periodicals Directory.

• Quick Answer: How do I verify that my article is peer reviewed?

What about resources that are not peer-reviewed?

Limiting your search to peer review is a way that you can ensure that you're looking at scholarly journal articles, and not popular or trade publications. Because peer-reviewed articles have been vetted by experts in the field, they are viewed as being held to a higher standard, and therefore are considered to be a high quality source. Professors often prefer peer-reviewed articles because they are considered to be of higher quality.

There are times, though, when the information you need may not be available in a peer-reviewed article.

• You may need to find original work on a theory that was first published in a book.
• You may need to find very current statistical data that comes from a government website.
• You may need background information that comes from a scholarly encyclopedia.

You will want to evaluate these resources to make sure that they are the best source for the information you need.

Note: If you are required for an assignment to find information from a peer-reviewed journal, then you will not be able to use non-peer-reviewed sources such as books, dissertations, or government websites. It's always best to clarify any questions over assignments with your professor.

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• Next Page: Primary & Secondary Sources
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Peer Reviewed Literature

What is peer review, terminology, peer review what does that mean, what types of articles are peer-reviewed, what information is not peer-reviewed, what about google scholar.

• How do I find peer-reviewed articles?
• Scholarly vs. Popular Sources

Research Librarian

For more help on this topic, please contact our Research Help Desk: [email protected] or 781-768-7303. Stay up-to-date on our current hours . Note: all hours are EST.

This Guide was created by Carolyn Swidrak (retired).

Research findings are communicated in many ways.  One of the most important ways is through publication in scholarly, peer-reviewed journals.

Research published in scholarly journals is held to a high standard.  It must make a credible and significant contribution to the discipline.  To ensure a very high level of quality, articles that are submitted to scholarly journals undergo a process called peer-review.

Once an article has been submitted for publication, it is reviewed by other independent, academic experts (at least two) in the same field as the authors.  These are the peers.  The peers evaluate the research and decide if it is good enough and important enough to publish.  Usually there is a back-and-forth exchange between the reviewers and the authors, including requests for revisions, before an article is published. 

Peer review is a rigorous process but the intensity varies by journal.  Some journals are very prestigious and receive many submissions for publication.  They publish only the very best, most highly regarded research. 

The terms scholarly, academic, peer-reviewed and refereed are sometimes used interchangeably, although there are slight differences.

Scholarly and academic may refer to peer-reviewed articles, but not all scholarly and academic journals are peer-reviewed (although most are.)  For example, the Harvard Business Review is an academic journal but it is editorially reviewed, not peer-reviewed.

Peer-reviewed and refereed are identical terms.

From  Peer Review in 3 Minutes  [Video], by the North Carolina State University Library, 2014, YouTube (https://youtu.be/rOCQZ7QnoN0).

Peer reviewed articles can include:

• Original research (empirical studies)
• Review articles
• Systematic reviews
• Meta-analyses

There is much excellent, credible information in existence that is NOT peer-reviewed.  Peer-review is simply ONE MEASURE of quality. 

Much of this information is referred to as "gray literature."

Government Agencies

Government websites such as the Centers for Disease Control (CDC) publish high level, trustworthy information.  However, most of it is not peer-reviewed.  (Some of their publications are peer-reviewed, however. The journal Emerging Infectious Diseases, published by the CDC is one example.)

Conference Proceedings

Papers from conference proceedings are not usually peer-reviewed.  They may go on to become published articles in a peer-reviewed journal. 

Dissertations

Dissertations are written by doctoral candidates, and while they are academic they are not peer-reviewed.

Many students like Google Scholar because it is easy to use.  While the results from Google Scholar are generally academic they are not necessarily peer-reviewed.  Typically, you will find:

• Peer reviewed journal articles (although they are not identified as peer-reviewed)
• Unpublished scholarly articles (not peer-reviewed)
• Masters theses, doctoral dissertations and other degree publications (not peer-reviewed)
• Book citations and links to some books (not necessarily peer-reviewed)
• Next: How do I find peer-reviewed articles? >>
• Last Updated: Aug 14, 2024 10:25 AM
• URL: https://libguides.regiscollege.edu/peer_review

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Which Source Should I Use?

• The Right Source For Your Need-Authority
• Finding Subject Specific Sources: Research Guides
• Understanding Peer Reviewed Articles
• Understanding Peer Reviewed Articles- Arts & Humanities
• How to Read a Journal Article
• Locating Journals
• How to Find Streaming Media

The Peer Review Process

So you need to use scholarly, peer-reviewed articles for an assignment...what does that mean? 

Peer review  is a process for evaluating research studies before they are published by an academic journal. These studies typically communicate  original research  or analysis for other researchers. 

The Peer Review Process at a Glance:

Looking for peer-reviewed articles?  Try searching in OneSearch or a library database  and look for options to limit your results to scholarly/peer-reviewed or academic journals. Check out this brief tutorial to show you how:   How to Locate a Scholarly (Peer Reviewed) Article

Part 1: Watch the Video

Part 1: watch the video all about peer review (3 min.) and reflect on discussion questions..

Discussion Questions

After watching the video, reflect on the following questions:

• According to the video, what are some of the pros and cons of the peer review process?
• Why is the peer review process important to scholarship?
• Do you think peer reviewers should be paid for their work? Why or why not?

Part 2: Practice

Part 2: take an interactive tutorial on reading a research article for your major..

Includes a certification of completion to download and upload to Canvas.

Social Sciences

(e.g. Psychology, Sociology)

(e.g. Health Science, Biology)

Arts & Humanities

(e.g. Visual & Media Arts, Cultural Studies, Literature, History)

Click on the handout to view in a new tab, download, or print.

For Instructors

• Teaching Peer Review for Instructors

In class or for homework, watch the video “All About Peer Review” (3 min.) .

Video discussion questions:

• According to the video, what are some of the pros and cons of the peer review process

Assignment Ideas

• Ask students to conduct their own peer review of an important journal article in your field. Ask them to reflect on the process. What was hard to critique?
• Have students examine a journals’ web page with information for authors. What information is given to the author about the peer review process for this journal?
• Assign this reading by CSUDH faculty member Terry McGlynn, "Should journals pay for manuscript reviews?" What is the author's argument? Who profits the most from published research? You could also hold a debate with one side for paying reviewers and the other side against.
• Search a database like Cabell’s for information on the journal submission process for a particular title or subject. How long does peer review take for a particular title? Is it is a blind review? How many reviewers are solicited? What is their acceptance rate?
• Assign short readings that address peer review models. We recommend this issue of Nature on peer review debate and open review and this Chronicle of Higher Education article on open review in Shakespeare Quarterly .

Proof of Completion

Mix and match this suite of instructional materials for your course needs!

Questions about integrating a graded online component into your class, contact the Online Learning Librarian, Rebecca Nowicki ( [email protected] ).

Example of a certificate of completion:

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• Next: Understanding Peer Reviewed Articles- Arts & Humanities >>
• Last Updated: Jun 12, 2024 2:51 PM
• URL: https://libguides.sdsu.edu/WhichSource

What are Peer-Reviewed Journals?

• A Definition of Peer-Reviewed
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Additional Resources

• What are Peer-reviewed Articles and How Do I Find Them? From Capella University Libraries

Introduction

Peer-reviewed journals (also called scholarly or refereed journals) are a key information source for your college papers and projects. They are written by scholars for scholars and are an reliable source for information on a topic or discipline. These journals can be found either in the library's online databases, or in the library's local holdings. This guide will help you identify whether a journal is peer-reviewed and show you tips on finding them.

What is Peer-Review?

Peer-review is a process where an article is verified by a group of scholars before it is published.

When an author submits an article to a peer-reviewed journal, the editor passes out the article to a group of scholars in the related field (the author's peers). They review the article, making sure that its sources are reliable, the information it presents is consistent with the research, etc. Only after they give the article their "okay" is it published.

The peer-review process makes sure that only quality research is published: research that will further the scholarly work in the field.

When you use articles from peer-reviewed journals, someone has already reviewed the article and said that it is reliable, so you don't have to take the steps to evaluate the author or his/her sources. The hard work is already done for you!

Identifying Peer-Review Journals

If you have the physical journal, you can look for the following features to identify if it is peer-reviewed.

Masthead (The first few pages) : includes information on the submission process, the editorial board, and maybe even a phrase stating that the journal is "peer-reviewed."

Publisher: Peer-reviewed journals are typically published by professional organizations or associations (like the American Chemical Society). They also may be affiliated with colleges/universities.

Graphics:  Typically there either won't be any images at all, or the few charts/graphs are only there to supplement the text information. They are usually in black and white.

Authors: The authors are listed at the beginning of the article, usually with information on their affiliated institutions, or contact information like email addresses.

Abstracts: At the beginning of the article the authors provide an extensive abstract detailing their research and any conclusions they were able to draw.

Terminology:  Since the articles are written by scholars for scholars, they use uncommon terminology specific to their field and typically do not define the words used.

Citations: At the end of each article is a list of citations/reference. These are provided for scholars to either double check their work, or to help scholars who are researching in the same general area.

Advertisements: Peer-reviewed journals rarely have advertisements. If they do the ads are for professional organizations or conferences, not for national products.

Identifying Articles from Databases

When you are looking at an article in an online database, identifying that it comes from a peer-reviewed journal can be more difficult. You do not have access to the physical journal to check areas like the masthead or advertisements, but you can use some of the same basic principles.

Points you may want to keep in mind when you are evaluating an article from a database:

• A lot of databases provide you with the option to limit your results to only those from peer-reviewed or refereed journals. Choosing this option means all of your results will be from those types of sources.  
• When possible, choose the PDF version of the article's full text. Since this is exactly as if you photocopied from the journal, you can get a better idea of its layout, graphics, advertisements, etc.  
• Even in an online database you still should be able to check for author information, abstracts, terminology, and citations.
• Next: Research Guides and Tutorials >>
• Last Updated: Dec 12, 2023 4:06 PM
• URL: https://libguides.bridgewater.edu/c.php?g=945314

Peer-Reviewed Literature: Peer-Reviewed Research: Primary vs. Secondary

• Peer-Reviewed Research: Primary vs. Secondary
• Types of Peer Review
• Identifying Peer-Reviewed Research

Peer Reviewed Research

Published literature can be either peer-reviewed or non-peer-reviewed. Official research reports are almost always peer reviewed while a journal's other content is usually not. In the health sciences, official research can be primary, secondary, or even tertiary. It can be an original experiment or investigation (primary), an analysis or evaluation of primary research (secondary), or findings that compile secondary research (tertiary). If you are doing research yourself, then primary or secondary sources can reveal more in-depth information.

Primary Research

Primary research is information presented in its original form without interpretation by other researchers. While it may acknowledge previous studies or sources, it always presents original thinking, reports on discoveries, or new information about a topic.

Health sciences research that is primary includes both experimental trials and observational studies where subjects may be tested for outcomes or investigated to gain relevant insight.  Randomized Controlled Trials are the most prominent experimental design because randomized subjects offer the most compelling evidence for the effectiveness of an intervention. See the below graphic and below powerpoint for further information on primary research studies.

• Research Design

Secondary Research

Secondary research is an account of original events or facts. It is secondary to and retrospective of the actual findings from an experiment or trial. These studies may be appraised summaries, reviews, or interpretations of primary sources and often exclude the original researcher(s). In the health sciences, meta-analysis and systematic reviews are the most frequent types of secondary research. 

• A meta-analysis is a quantitative method of combining the results of primary research. In analyzing the relevant data and statistical findings from experimental trials or observational studies, it can more accurately calculate effective resolutions regarding certain health topics.
• A systematic review is a summary of research that addresses a focused clinical question in a systematic, reproducible manner. In order to provide the single best estimate of effect in clinical decision making, primary research studies are pooled together and then filtered through an inclusion/exclusion process. The relevant data and findings are then compiled and synthesized to arrive at a more accurate conclusion about a specific health topic. Only peer-reviewed publications are used and analyzed in a methodology which may or may not include a meta-analysis.

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• Next: Types of Peer Review >>
• Last Updated: Sep 29, 2023 10:05 AM
• URL: https://ttuhsc.libguides.com/PeerReview

Evaluating Information Sources: What Is A Peer-Reviewed Article?

• Should I Trust Internet Sources?

What Is A Peer-Reviewed Article?

Anali Perry, a librarian from Arizona State University Libraries, gives a quick definition of a peer-reviewed article.

The Library Minute: Academic Articles from ASU Libraries on Vimeo .

How Do Peer-Reviewed Articles Differ From Popular Ones?

This 3 minute video from the Peabody Library at Vanderbilt University talks about the differences between popular and scholarly articles.  It also mentions trade publications. 

What Is Peer Review?

In academic publishing, the goal of peer review is to assess the quality of articles submitted for publication in a scholarly journal. Before an article is deemed appropriate to be published in a peer-reviewed journal, it must undergo the following process:

• The author of the article must submit it to the journal editor who forwards the article to experts in the field. Because the reviewers specialize in the same scholarly area as the author, they are considered the author’s peers (hence “peer review”).
• These impartial reviewers are charged with carefully evaluating the quality of the submitted manuscript.
• The peer reviewers check the manuscript for accuracy and assess the validity of the research methodology and procedures.
• If appropriate, they suggest revisions. If they find the article lacking in scholarly validity and rigor, they reject it.

Because a peer-reviewed journal will not publish articles that fail to meet the standards established for a given discipline, peer-reviewed articles that are accepted for publication exemplify the best research practices in a field.

Features of a Peer-Reviewed Article

When you are determining whether or not the article you found is a peer-reviewed article, you should consider the following.

Does the article have the following features?

Also consider...

• Is the journal in which you found the article published or sponsored by a professional scholarly society, professional association, or university academic department? Does it describe itself as a peer-reviewed publication? (To know that, check the journal's website). 
• Did you find a citation for it in one of the  databases that includes scholarly publications? (Academic Search Complete, PsycINFO, etc.)?  Read the database description to see if it includes scholarly publications.
• In the database, did you limit your search to scholarly or peer-reviewed publications? (See video tutorial below for a demonstration.)
• Is the topic of the article narrowly focused and explored in depth ?
• Is the article based on either original research or authorities in the field (as opposed to personal opinion)?
• Is the article written for readers with some prior knowledge of the subject?
• If your field is social or natural science, is the article divided into sections with headings such as those listed below?

How Do I Find Peer-Reviewed Articles?

The easiest and fastest way to find peer-reviewed articles is to search the online library databases , many of which include peer-reviewed journals. To make sure your results come from peer-reviewed (also called "scholarly" or "academic") journals, do the following:

• Read the database description to determine if it features peer-reviewed articles.
• When you search for articles, choose the Advanced Search option. On the search screen, look for a check-box that allows you to limit your results to peer-reviewed only.
• If you didn't check off the "peer-reviewed articles only" box, try to see if your results can organized by source . For example, the database Criminal Justice Abstracts will let you choose the tab "Peer-Reviewed Journals."

Video tutorial

Watch this video through to the end. It will show you how to use a library database and how to narrow your search results down to just peer-reviewed articles.

• << Previous: Should I Trust Internet Sources?
• Last Updated: Aug 21, 2019 2:00 PM
• URL: https://guides.lib.jjay.cuny.edu/evaluatingsources

Research Paper: What is the state of the art on traditional medicine interventions for zoonotic diseases in the Indian subcontinent? A scoping review of the peer-reviewed evidence base

What is the state of the art on traditional medicine interventions for zoonotic diseases in the indian subcontinent a scoping review of the peer-reviewed evidence base.

Festus A. Asaaga, Emmanuel S. Tomude, Mujeeb Rahman, Irfan Shakeer, Nitya S. Ghotge, Sarah J. Burthe, Stefanie M. Schäfer, Abi T. Vanak, Bethan V. Purse, Subhash L.Hoti

29 June 2024

Traditional medicine (TM) interventions are plausible therapeutic alternatives to conventional medical interventions against emerging and endemic zoonotic diseases, particularly in low-and middle-income countries that may lack resources and infrastructure. Despite the growing popularity in the usage of TM interventions, their clinical safety and effectiveness are still contested within conventional healthcare in many countries.

We conducted a scoping review of the peer-reviewed literature that synthesises and maps the evidence on TM interventions for the treatment and prevention of zoonoses on the Indian subcontinent. The region, a global hotspot of biodiversity and emerging infections, is characterised by high prevalence of TM use. Based on the scientific literature, our review (1) maps the scope of the literature, (2) synthesises the evidence on the application of TM interventions for zoonoses, and (3) critically reflects on the state of TM and identifies areas for future research focus.

The evidence synthesis confirmed widespread usage of TM interventions for zoonoses on the subcontinent, with the majority of research reported from India, followed by Pakistan, Bangladesh, and Sri Lanka. Most of the reviewed studies reported on ethno-medicinal uses of plant species, primarily for treating dengue, tuberculosis, Escherichia coli infection, lymphatic filariasis and cholera. However, the evidence on the safety and effectiveness of these reported TM interventions is limited, indicating that these data are rarely collected and/or shared within the peer-reviewed literature.

This review thus highlights that, whilst TMs are already being used and could offer more widely accessible interventions against emerging and endemic zoonoses and ectoparasites, there is an urgent need for rigorous clinical testing and validation of the safety and effectiveness of these interventions.

Asaaga, F.A., Tomude, E.S., Rahman, M. et al.What is the state of the art on traditional medicine interventions for zoonotic diseases in the Indian subcontinent? A scoping review of the peer-reviewed evidence base. BMC Complement Med Ther 24, 249 (2024).

https://doi.org/10.1186/s12906-024-04553-8

Published: 29 June 2024