CASRAI Dictionary

Tag: cope authorship guidelines

  • ICMJE Authorship Order: The Guarantor Role CRediT Never Named

    ICMJE authorship order is not dictated by the ICMJE Recommendations — author groups decide it collectively. But ICMJE’s four authorship criteria also require every listed author to be accountable for the paper’s integrity, a duty many journals formalise as a single named “guarantor.” CRediT’s 14 contributor roles describe what each person did, not who answers for the work, so no CRediT role names this accountability function.

    A guarantor is the author (or authors) a journal designates as taking full responsibility for the integrity of the whole paper, from data access to the decision to publish. This creates a practical gap for any journal, institution, or author-services team trying to satisfy ICMJE’s accountability principle and CASRAI-originated CRediT contributor role taxonomy requirements in the same submission workflow.

    What is the ICMJE “guarantor” role?

    The word “guarantor” does not appear in the current ICMJE Recommendations text. It is a journal-level formalisation of ICMJE’s fourth authorship criterion — agreement to be accountable for all aspects of the work — adopted independently by individual journals and editorial bodies.

    The BMJ’s author guidance states plainly: “One contributor must be listed as the guarantor of the paper. The guarantor accepts full responsibility for the work and/or the conduct of the study, had access to the data, and controlled the decision to publish.” The World Association of Medical Editors (WAME) uses near-identical language, and the Council of Science Editors (CSE) recommends “at least 1 coauthor assuming the role of content guarantor.” The UK Research Integrity Office (UKRIO) frames it the same way: contributors are responsible for their own contribution, “but at least one person — the guarantor — needs to accept accountability for the whole work.”

    In practice, the guarantor is usually the principal investigator or senior author — the person best placed to vouch for the study from inception to publication, including responding to post-publication integrity queries.

    How does ICMJE authorship order actually work?

    ICMJE explicitly leaves authorship order to the author group. “The criteria used to determine the order in which authors are listed on the byline may vary, and are to be decided collectively by the author group and not by editors,” per the ICMJE Recommendations. Editors are told not to arbitrate order disputes; unresolved disagreements go to the authors’ institution, not the journal.

    Before order, ICMJE sets four cumulative gatekeeping criteria for who counts as an author at all:

    1. Substantial contribution to conception/design, or acquisition, analysis, or interpretation of data;
    2. Drafting the work or revising it critically for important intellectual content;
    3. Final approval of the version to be published;
    4. Agreement to be accountable for all aspects of the work, ensuring questions about accuracy or integrity are investigated and resolved.

    All four must be met — meeting only one or two justifies acknowledgment, not authorship. This is ICMJE’s primary defence against honorary (gift) authorship, where seniority or funding alone earns a byline place without a qualifying contribution.

    Guarantor vs corresponding author vs CRediT roles

    These three labels are routinely conflated in submission systems, yet each answers a different question. Confusing them is a common source of author disputes and incomplete disclosure statements.

    Role Answers the question Defined by Typically held by
    Guarantor Who is accountable for the paper’s integrity as a whole? Individual journals (e.g. The BMJ, WAME, CSE) — not ICMJE’s text directly Principal investigator or senior author
    Corresponding author Who handles communication with the journal? ICMJE Recommendations Whoever manages submission, peer review and post-publication queries
    CRediT contributor role What did each person actually do? ANSI/NISO Z39.104-2022 Any contributor, author or non-author

    The same person often holds all three roles, but nothing requires it. A guarantor need not be the corresponding author; a corresponding author need not have contributed to every CRediT role assigned on the paper.

    Why CRediT’s 14 roles never named accountability

    CASRAI originated the CRediT contributor role taxonomy in 2014. The standard is now stewarded by NISO as ANSI/NISO Z39.104-2022. Its 14 roles — Conceptualization, Data Curation, Formal Analysis, Funding Acquisition, Investigation, Methodology, Project Administration, Resources, Software, Supervision, Validation, Visualization, Writing – Original Draft, and Writing – Review & Editing — were built to answer a single question: what contribution did this person make?

    CRediT was never designed to determine authorship or assign accountability; it deliberately covers non-author contributors too. That is precisely why it has no “guarantor” equivalent: guarantorship is not a type of contribution, it is a standing obligation to vouch for the finished, published record. Mapping the two frameworks side by side exposes a structural gap rather than an oversight — CRediT catalogues labour, ICMJE’s guarantor concept assigns liability.

    This distinction matters for research integrity investigations. When COPE authorship guidelines are invoked in a misconduct case, investigators ask who is accountable, not just who contributed which section — a question CRediT statements alone cannot answer.

    Answer-first Q&A

    What are the rules for authorship in the ICMJE?

    ICMJE requires all four authorship criteria to be met cumulatively: a substantial contribution to the work, drafting or critical revision, final approval of the published version, and agreement to be accountable for its accuracy and integrity. Meeting only some criteria warrants acknowledgment, not a byline.

    What is the order of authorship in a publication?

    ICMJE does not prescribe an order. It is a joint decision of the co-authors, commonly reflecting descending contribution, though alphabetical and role-based conventions (first/last-author-senior) exist. Authors should be able to explain the chosen order if questioned.

    What is a guarantor in a journal?

    A guarantor is the author who “takes full responsibility for the integrity of the work as a whole, from inception to published article,” accepting accountability even for sections they did not personally execute. Many biomedical journals require exactly one guarantor to be named at submission.

    Is the corresponding author the same as the guarantor?

    Not necessarily. The corresponding author is ICMJE’s designated point of contact for editorial correspondence; the guarantor is a separate, journal-added accountability role. The same individual frequently fills both, but journals should let authors specify them independently.

    Recommendations for journals requiring both frameworks

    Journals and publishers running ICMJE-aligned author guidelines alongside a CRediT contribution statement should treat the two as complementary layers, not duplicate paperwork:

    • Add a distinct “Guarantor” field to submission systems, separate from both “Corresponding author” and the CRediT role matrix.
    • Require the guarantor to confirm data access and the decision-to-publish sign-off explicitly, not infer it from a CRediT “Supervision” or “Project administration” tag.
    • Publish the CRediT statement and the guarantor designation together in the same author-contributions section, so readers and integrity investigators see contribution and accountability side by side.
    • Where honorary authorship risk is high (large consortia, industry-sponsored trials), cross-check that the named guarantor also satisfies all four ICMJE authorship criteria — a guarantor who is not a qualifying author is itself a red flag under COPE authorship guidelines.

    As more journals adopt structured authorship and contributorship disclosure, the guarantor concept is likely to become more explicit in editorial policy rather than less — it is the accountability layer that a purely descriptive contributor taxonomy was never built to provide. Institutions drafting local authorship policy should document both requirements separately, since neither framework can substitute for the other.

  • Authorship Disputes and CRediT Role Statements

    An authorship dispute is a disagreement among collaborators, or between collaborators and a journal, over who should be named as an author, in what order, or for what contribution. Requiring a CRediT contributor role statement before submission forces these disagreements into the open earlier than a traditional byline negotiation does — but assigning any of the taxonomy’s 14 fixed labels to messy, overlapping research work can itself become the trigger for a new argument, particularly at the boundary between roles such as “Conceptualization” and “Methodology”, or “Writing – original draft” and “Writing – review & editing”.

    An authorship dispute is distinct from research misconduct: it is a conflict over credit allocation, not (necessarily) over the integrity of the underlying work, though the Committee on Publication Ethics (COPE) treats persistent authorship disputes as a publication-ethics matter in their own right. This piece argues that CRediT statements are a net improvement on silent byline negotiation precisely because they move the argument earlier and make it visible — but only if editors and institutions treat role-label disagreements as a normal, expected cost of that visibility, not as a new form of misconduct.

    Contents

    What is an authorship dispute, and how does it differ from a CRediT disagreement?

    An authorship dispute arises when one or more people believe they have been wrongly included, wrongly excluded, wrongly ordered, or wrongly credited on a manuscript’s byline. Under the International Committee of Medical Journal Editors (ICMJE) recommendations, authorship requires meeting four cumulative criteria: substantial contribution to the work’s conception or design (or data acquisition, analysis, or interpretation); drafting or critically revising the manuscript; final approval of the published version; and agreement to be accountable for all aspects of the work.

    A CRediT disagreement is narrower: it is a dispute over which of the 14 standardised roles — Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, and Writing – review & editing — best describes a given contribution. Meeting ICMJE’s criteria determines whether someone is an author at all; a CRediT statement determines what they did. Conflating the two is itself a common source of dispute, because a role such as “Funding acquisition” or “Resources” alone typically does not satisfy ICMJE’s authorship bar even where it is listed in a CRediT statement.

    How does a CRediT statement surface disputes earlier than a byline negotiation?

    Traditional byline negotiation happens once, late, and informally — usually in the days before submission, when reordering the author list feels costly and confrontational. A CRediT statement forces the same conversation to happen role-by-role, against a fixed public taxonomy, which changes the dynamics in three concrete ways.

    • It replaces vague credit with itemised credit. “Senior author” or “second author” carries status but no content; a CRediT line naming specific roles is falsifiable — a co-author can point to the statement and say a role is missing or wrongly attributed.
    • It discourages honorary and ghost authorship. A person who cannot be assigned even one of the 14 roles has a much harder time justifying inclusion on the byline, and a genuine contributor omitted from every role is easier to identify and challenge before publication.
    • It gives institutions a common vocabulary for early mediation. The National Institutes of Health’s Office of Intramural Research has documented using the CRediT taxonomy as a working tool in authorship conflict resolution, precisely because it gives disputing parties shared terms rather than competing personal narratives.

    Because the statement is drafted and circulated before submission — not after acceptance — disagreements that would otherwise surface only after publication (when a name is missing from Acknowledgements, as in COPE’s own case archive) are instead raised while the manuscript can still be corrected without a published erratum.

    Where do CRediT statements create new disputes over role labels?

    The taxonomy’s fixed categories are also its weakness: real research contributions rarely sit neatly inside one label, and disagreement over which label applies can become a proxy fight over seniority. Three boundary pairs generate a disproportionate share of reported friction.

    Role boundary Typical source of dispute Practical mitigation
    Conceptualization vs Methodology A junior researcher’s substantive methodological design work is folded into a senior researcher’s “Conceptualization” credit Assign both roles where genuinely shared; do not treat roles as mutually exclusive
    Writing – original draft vs Writing – review & editing A contributor who substantially rewrites a section is credited only with “review & editing”, understating a near-authorial contribution Reserve “original draft” for anyone who materially restructures or rewrites, not only the first drafter
    Supervision vs Project administration Principal investigators default to “Supervision” for administrative coordination that a lab manager actually performed Separate scientific supervision from day-to-day administrative coordination explicitly

    These are role-label disputes, not authorship disputes in the ICMJE sense — but left unresolved they escalate into exactly that, because a contributor who feels under-credited on the CRediT statement will often then contest their position, or even their inclusion, on the byline itself.

    How do COPE and journals resolve CRediT-related authorship disputes?

    COPE’s published guidance is explicit that it is not the publisher’s role to adjudicate who contributed what — that determination sits with the authors’ institution. COPE Council advice on contested-authorship cases consistently directs journals to require written agreement from all listed authors before any name is added, removed, or reordered, and to point disputing parties toward institutional research-integrity offices rather than editorial staff.

    The UK Research Integrity Office (UKRIO) published a Model Authorship Dispute Procedure on 17 September 2025, giving institutions a structured, impartial process independent of any single journal’s editorial judgement. Separately, the NIH Intramural Research Program’s authorship conflict resolution policy, updated 22 September 2025, notes that journals typically rely on institutional officials rather than resolving disputes themselves — reinforcing that a CRediT statement is evidence for that institutional process, not a substitute for it.

    CASRAI originated the CRediT contributor role taxonomy in 2014. The standard is now stewarded by NISO as ANSI/NISO Z39.104-2022, which is the current normative reference for the 14 role definitions cited throughout this article.

    Common questions on authorship disputes

    What is an authorship dispute?

    An authorship dispute is a disagreement among collaborators, or between a contributor and a journal, over inclusion on the byline, author order, or credit for a specific contribution. It typically surfaces when perceptions of contribution diverge from the final author list or when someone is omitted from a published article.

    What can lead to disputes over authorship?

    Disputes commonly arise from poor communication about roles at the project’s outset, unequal power dynamics between senior and junior researchers, disagreement over the significance of a specific contribution, and inconsistent application of ICMJE authorship criteria across collaborating institutions. Establishing roles and order in writing before submission substantially reduces this risk.

    What are common author list disputes?

    The most frequent disputes concern author order (who is listed first or last), inappropriate application of authorship criteria (crediting funding or resource provision alone as authorship), omission of contributors who assisted with drafting or analysis, and disagreement over whether a supervisory role merits inclusion at all rather than an acknowledgement.

    What should institutions and journals do differently?

    Treating a CRediT statement as a compliance checkbox misses its value. Research offices should require the statement to be drafted and agreed in writing at project outset — not retrofitted at submission — so role-label disagreements surface while still cheap to resolve. Journals should state clearly, in author instructions, that CRediT roles describe contribution type and do not by themselves confer authorship under ICMJE or equivalent criteria.

    Publishers should route unresolved role-label disagreements to the same institutional channel used for full authorship disputes, rather than leaving editorial staff to adjudicate contribution significance they have no basis to assess. The corresponding author remains accountable for the accuracy of the final statement, but that accountability is not the same as sole authority to write it.

    A CRediT statement will not eliminate authorship disputes. What the evidence from COPE’s case archive and the 2025 institutional procedures from UKRIO and NIH suggests is narrower and more useful: it moves the argument earlier, gives it a shared vocabulary, and converts an informal status negotiation into a documented, revisable record — provided institutions are prepared to treat disagreement over the record itself as ordinary business, not as a symptom of misconduct.

  • COPE Authorship Guidelines: Beyond ICMJE and CRediT

    COPE authorship guidelines exist because knowing who qualifies as an author is only half the problem — the harder half is what to do when people disagree. ICMJE’s four criteria define who should be listed; CRediT’s contributor-role vocabulary describes what each person did; COPE’s guidance is the only one of the three built around process — journal policy, pre-submission agreement, and a defined path for investigating disputes before and after publication.

    The Committee on Publication Ethics (COPE) is a UK-based membership organisation that provides journal editors, publishers, and institutions with guidance and case-by-case advice on publication integrity, including authorship. It does not set a competing definition of “author” — instead, it tells editors and institutions what to do when a definition, whether ICMJE’s or a discipline-specific equivalent, is contested.

    What is COPE and what do its authorship guidelines cover?

    COPE’s core authorship guidance is set out in its Discussion Document: Authorship, first published in 2014 and updated to version 2 on 20 September 2019. Unlike ICMJE, which publishes a fixed set of criteria for biomedical journals, COPE addresses authorship across all disciplines through discussion documents, position statements, case studies, and flowcharts aimed at editors and institutions rather than authors alone.

    COPE states that two requirements are common to every authorship definition it has reviewed: a substantial contribution to the work, and accountability for the work and its published form. Everything else — order, thresholds, disciplinary norms — is left to journals and institutions to codify, provided the policy is transparent and published in the journal’s author guidelines.

    Where do ICMJE’s criteria and CRediT’s roles stop?

    ICMJE, CRediT, and COPE answer three different questions, and conflating them is the single most common source of confusion in editorial offices. ICMJE’s Recommendations require that an author meet all four of its criteria — substantial contribution to conception, design, or data; drafting or critical revision; final approval; and accountability. CASRAI originated the CRediT contributor role taxonomy in 2014 to describe, with a controlled vocabulary of 14 roles, what each named contributor actually did on a paper. The standard is now stewarded by NISO as ANSI/NISO Z39.104-2022. Neither framework tells an editor what to do when two contributors dispute their place on that list.

    Framework Core question it answers Governing body What it does not cover
    ICMJE Who qualifies as an author? International Committee of Medical Journal Editors How to resolve disagreement over who qualifies
    CRediT What did each contributor do? NISO (ANSI/NISO Z39.104-2022); originated by CASRAI, 2014 Whether a listed role qualifies someone for authorship
    COPE What process should editors and institutions follow? Committee on Publication Ethics A fixed, universal authorship definition

    This is the structural gap COPE fills: it does not compete with ICMJE’s criteria or CRediT’s contributor roles — it operationalises them. A journal can require ICMJE compliance, request a CRediT statement at submission, and still have no mechanism for handling a dispute unless it also adopts COPE-style process guidance.

    How does COPE’s authorship dispute process work?

    COPE’s approach treats authorship disputes as an editorial and institutional workflow, not a single adjudication. Its position on handling changes to authorship lists, published 20 August 2024, instructs editors to scrutinise any request to add, remove, or reorder authors after submission, confirm that all listed authors agree to the change in writing, and query the reason if consent is not unanimous.

    Journals are explicitly told they are usually not equipped to adjudicate contested claims about who contributed what. COPE’s guidance directs editors to refer unresolved disputes to the authors’ affiliated institutions for formal investigation — a division of labour that ICMJE and CRediT are silent on. In the UK, this maps directly onto instruments such as the UK Research Integrity Office’s Model Authorship Dispute Procedure, published September 2025, which gives institutions a structured, impartial process for exactly this referral.

    • Confirm authorship and order before submission, and keep a written record of the agreement.
    • Treat any post-submission change to the author list as requiring signed consent from every listed and proposed author.
    • Query unexplained additions, removals, or reordering rather than accepting them at face value.
    • Refer disputes the journal cannot resolve to the authors’ institution for investigation.
    • Use acknowledgements, not the author list, for contributions that fall short of authorship thresholds.

    How does COPE define ghost, guest, and gift authorship?

    COPE’s guidance gives editors concrete labels for the authorship failures that ICMJE’s criteria are designed to prevent but do not name. Ghost authorship occurs when someone who made a substantial contribution — often a medical writer or industry statistician — is omitted from the byline. Guest (or honorary) authorship is the reverse: someone is listed despite not meeting the substantial-contribution and accountability thresholds, typically because of seniority or influence. Gift authorship describes the same practice motivated by reciprocity or favour-trading between colleagues.

    All three practices can technically pass an ICMJE checklist if contributions are misreported, and a CRediT statement can be filled in inaccurately with no built-in verification. COPE’s contribution is procedural: it recommends that authorship statements be corroborated at submission and that suspected guest or ghost authorship be investigated using the same institutional-referral pathway as other authorship disputes, rather than treated as a simple correction.

    Common authorship questions answered

    What are the ICMJE’s four authorship criteria?

    The ICMJE requires that an author make a substantial contribution to conception, design, or data; draft or critically revise the work; give final approval of the version published; and agree to be accountable for its accuracy and integrity. All four criteria must be met, not just one.

    What are the minimum requirements for authorship under COPE?

    COPE identifies two requirements common to every authorship definition it reviewed: a substantial contribution to the work, and accountability for the work and its published form. Beyond these two, COPE leaves discipline-specific thresholds to individual journals and institutions to define transparently.

    What is an authorship dispute?

    An authorship dispute is disagreement over who should be listed as an author, in what order, or over the accuracy of a submitted author list. COPE’s guidance directs editors to first seek resolution among the authors themselves, then refer unresolved cases to the relevant institution for formal investigation.

    What commonly causes author list disputes?

    Disputes commonly arise from ghost, guest, or gift authorship, unclear contribution thresholds, late changes to author order, and the omission of contributors such as statisticians or writers. COPE recommends agreeing authorship in writing before submission to prevent most of these disputes from reaching the journal.

    Implications for institutions, journals, and researchers

    The practical takeaway for research administrators is that ICMJE compliance and a completed CRediT statement are necessary but not sufficient. A journal or institution without a COPE-aligned dispute procedure has defined who should be an author and how their contribution is described, but has no answer for what happens when someone disagrees. Institutions that adopt a written, COPE-referenced authorship policy — mirroring models such as UKRIO’s 2025 procedure — close that gap before a dispute reaches the point of a correction, retraction, or reputational damage.

    As CRediT adoption continues to expand under NISO stewardship and journals increasingly request contributor statements at submission, the process layer COPE provides becomes more, not less, relevant: a more granular contribution record creates more surface area for disagreement about whether a given role meets an authorship threshold. Institutions that pair authorship policy with a clear, COPE-consistent dispute pathway are better placed to resolve those disagreements before they escalate.

  • ICMJE Authorship Criteria First Author vs CRediT Contributor Roles

    The ICMJE authorship criteria for a first author are exactly the same as the criteria for every other author — the International Committee of Medical Journal Editors sets four cumulative conditions that any contributor must meet to be named an author at all, and it applies no separate, stricter, or additional test to whoever appears first on the byline. CRediT then answers a completely different question: what, specifically, did each already-qualifying author do.

    ICMJE authorship criteria are four cumulative conditions — substantial contribution, drafting or critical revision, final approval, and accountability — that determine who is entitled to appear on a byline at all, independent of position or order.

    What are the ICMJE’s four authorship criteria?

    The ICMJE recommends that authorship be based on four criteria, and all four must be met by every person named as an author — there is no partial credit and no exemption for a shorter or longer byline position. The framework is a gate, not a scale: a contributor is either inside it or outside it.

    1. Substantial contributions to the conception or design of the work, or the acquisition, analysis, or interpretation of data.
    2. Drafting the work or reviewing it critically for important intellectual content.
    3. Final approval of the version to be published.
    4. Agreement to be accountable for all aspects of the work, including ensuring that questions about accuracy or integrity are investigated and resolved.

    Contributors who meet fewer than all four criteria should not be listed as authors; the ICMJE directs that they be acknowledged instead, with contributions such as funding acquisition, general supervision, or technical editing named as examples that do not, alone, justify authorship. The ICMJE also states plainly that it is the collective responsibility of the authors — not the journal — to determine that everyone named meets all four criteria.

    Does ICMJE set a separate standard for the first author?

    No. The ICMJE’s Recommendations explicitly state that “the criteria used to determine the order in which authors are listed on the byline may vary, and are to be decided collectively by the author group and not by editors.” There is no ICMJE clause that names a “lead” or “first” author category, and no additional hurdle applies once the four-criteria gate has been cleared.

    What functions as “first authorship” is convention, not policy: in most biomedical and life-science fields, the first-listed name is understood to signal the largest single contribution to conception, execution, and drafting. Some journals — The Lancet among them — accommodate this by allowing a footnote to mark co-first authorship on the article itself, while still not recognising co-first status in indexed reference lists. Confusing byline position with the ICMJE’s eligibility test is the single most common misreading of the guidance.

    What is CRediT, and how does it differ from an authorship criterion?

    CRediT (the Contributor Roles Taxonomy) is a standardised set of 14 role terms used to describe the specific contribution each named author made to a published work — for example Conceptualization, Investigation, Writing – original draft, or Supervision. CASRAI originated the CRediT contributor role taxonomy in 2014. The standard is now stewarded by NISO as ANSI/NISO Z39.104-2022, and it is descriptive rather than gatekeeping: it never decides who counts as an author, only what an author who already qualifies actually did.

    • Conceptualization
    • Data curation
    • Formal analysis
    • Funding acquisition
    • Investigation
    • Methodology
    • Project administration
    • Resources
    • Software
    • Supervision
    • Validation
    • Visualization
    • Writing – original draft
    • Writing – review & editing

    The practical distinction editors need is structural, not just semantic:

    Dimension ICMJE authorship criteria CRediT contributor roles
    Question answered Who qualifies as an author at all? What did each qualifying author do?
    Structure Four cumulative, binary conditions 14 non-exclusive, multi-select labels
    Governing body ICMJE recommendations Originated by CASRAI (2014); stewarded by NISO as ANSI/NISO Z39.104-2022
    When applied Before the authorship decision is finalised At submission, tagged against each named author
    Says anything about order? No — order is left to the author group No — roles are unordered and can overlap

    Where do COPE guidelines and the corresponding author fit?

    The Committee on Publication Ethics (COPE) supplies the process layer that ICMJE deliberately leaves out: what to do when authors disagree. COPE publishes flowcharts and discussion documents for suspected authorship disputes, and — consistent with ICMJE’s own position — directs editors not to arbitrate who qualifies as an author, instead pointing conflicts back to the author group or, if unresolved, the institution where the work was performed.

    The corresponding author is a separate role again. Per ICMJE, the corresponding author “takes primary responsibility for communication with the journal during the manuscript submission, peer-review, and publication process” and remains available after publication to respond to queries about the work. A corresponding author is frequently also the first author, but the two roles are not linked by any rule; either can be assigned independently by the author group.

    A decision flow: applying ICMJE and CRediT together

    Editors and research offices increasingly need to run both frameworks in sequence rather than treat them as competitors. A practical order of operations:

    1. Apply the ICMJE gate first. For each contributor, check all four criteria. Anyone who fails even one moves to the acknowledgements section, not the byline.
    2. Let the author group set order. Byline position, including who is “first,” is negotiated among qualifying authors — not assigned by the journal.
    3. Tag CRediT roles per author. Once the byline is fixed, the corresponding author records which of the 14 CRediT roles each author performed; multiple authors can share a role, and one author can hold several.
    4. Confirm the corresponding author. Designate who handles submission, peer review, and post-publication accountability — independently of first-author status.
    5. Escalate disputes via COPE, not the editor. If agreement breaks down, follow COPE’s authorship-dispute process and route unresolved cases to the authors’ institution.

    Frequently asked questions

    What is the authorship criteria for the first author?

    There is no separate ICMJE criteria for a first author. Every author, regardless of byline position, must meet the same four cumulative conditions: substantial contribution, drafting or critical revision, final approval, and accountability. Byline order is a convention the author group negotiates, not an ICMJE rule.

    Who is responsible for determining authorship under ICMJE?

    The authors themselves are responsible, ideally deciding at the planning stage and confirming before submission. ICMJE states it is not the role of journal editors to determine who qualifies or to arbitrate authorship conflicts; unresolved disputes go to the researchers’ institution instead.

    Does the Lancet allow co-first authors?

    The Lancet permits a footnote marking two authors as joint first authors on the published article itself, reflecting equal contribution. However, it does not recognise co-first authorship in indexed reference lists, where only the conventional first-listed name is retained.

    What counts as the first author on a paper?

    “First author” is a disciplinary convention, not an ICMJE category: it typically denotes the contributor judged to have made the largest share of the conception, execution, and drafting work. The author group — not the ICMJE and not the journal — decides who occupies that position.

    Implications for editors and institutions

    Treating ICMJE and CRediT as one merged checklist creates real friction: institutions have rejected tenure and grant applications over ambiguous “author order equals contribution” assumptions that the ICMJE never actually endorses. Separating the two frameworks resolves that friction directly — the eligibility question and the contribution question can be answered independently, in either order, without one distorting the other.

    As submission systems increasingly capture CRediT tags alongside ORCID iDs at the point of manuscript intake, research offices gain a byline that is both defensible under ICMJE’s accountability standard and legible at the level of individual contribution — useful for hiring, promotion, and funder reporting alike. Institutions building authorship policy should document both layers separately: an ICMJE-based eligibility check, and a CRediT-based contribution record, rather than a single blended authorship form.

  • ICMJE Authorship Criteria vs CRediT Roles: What the Four-Point Test Still Leaves Out

    The ICMJE authorship criteria are four cumulative conditions — substantial contribution, drafting or critical revision, final approval, and accountability — that a journal-listed author must meet in full. They decide who qualifies for the byline, but they say nothing about what each named author actually did, which is why a growing number of journals now pair the ICMJE test with a granular CRediT contributor-role declaration.

    The ICMJE authorship criteria are the International Committee of Medical Journal Editors’ four-part definition of authorship, first published in the ICMJE Recommendations and now the de facto global standard referenced by COPE, most biomedical journals, and many university research-integrity offices.

    What are the four ICMJE authorship criteria?

    The ICMJE recommends that authorship rest on four criteria, all of which must be met — not a majority. An individual must have made substantial contributions to conception, design, or data work; drafted or critically revised the manuscript; given final approval of the published version; and agreed to be accountable for its accuracy and integrity.

    • Criterion 1 — Substantial contribution: conception or design of the work, or acquisition, analysis, or interpretation of data.
    • Criterion 2 — Drafting or critical revision: writing the manuscript or reviewing it critically for important intellectual content.
    • Criterion 3 — Final approval: sign-off on the exact version submitted for publication.
    • Criterion 4 — Accountability: agreement to answer for the accuracy and integrity of any part of the work, including parts done by co-authors.

    The ICMJE is explicit that these criteria are not a filter for excluding deserving colleagues: anyone who meets criterion 1 must get the opportunity to participate in drafting, review, and approval, so they can also satisfy criteria 2–4. Funding acquisition, general supervision, and technical or language editing — on their own — do not qualify a contributor for authorship; those belong in the acknowledgements, not the byline.

    A newer addition addresses generative AI directly: under the current ICMJE Recommendations, journals must require disclosure of AI-assisted technology use, and chatbots such as ChatGPT cannot be listed as authors, because they cannot be held accountable for accuracy and integrity under criterion 4.

    Why does meeting the criteria still produce authorship disputes?

    The four-point test is qualitative, self-reported, and adjudicated by the author group itself — the ICMJE states explicitly that it is “the collective responsibility of the authors, not the journal” to determine who qualifies, and that editors should not arbitrate authorship conflicts. That design leaves real gaps in practice.

    • The biostatistician who never drafts. A statistician runs the primary analysis (clearly criterion 1) but is not invited to write or revise the manuscript, so criterion 2 is never offered to them — despite the ICMJE’s own instruction that anyone meeting criterion 1 should get that opportunity. This is one of the most common authorship grievances reported to COPE.
    • Guest and honorary authorship. A senior figure who supervised the lab, but did not contribute intellectually to conception, analysis, drafting, or revision, is added to the byline for prestige or funding-renewal reasons. COPE’s authorship guidance identifies two minimum requirements across authorship definitions — a substantial contribution and accountability — and honorary authors typically fail both.
    • Ghost authorship. A medical writer or industry statistician does the drafting and analysis but is left off the byline entirely, often in industry-funded clinical trials, obscuring who is actually accountable for the reported results.
    • Large multi-author consortia. When hundreds of contributors work on a single dataset or trial, the ICMJE recommends the group decide authorship before the work starts — but retrospectively verifying that every named individual met all four criteria, including final approval, becomes practically unenforceable at scale.

    In each case, the pass/fail structure of the ICMJE test cannot show a reader, an editor, or a research-integrity investigator which specific task a disputed author did or didn’t do. That is the exact gap CRediT was built to close.

    How do CRediT contributor roles add the missing granularity?

    CASRAI originated the CRediT contributor role taxonomy in 2014 as a structured vocabulary of contribution types. The standard is now stewarded by NISO as ANSI/NISO Z39.104-2022, and it defines 14 discrete roles — Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, and Writing – review & editing.

    Where the ICMJE test asks a single binary question — author or not — CRediT asks a descriptive one: which of these 14 tasks did this named contributor actually perform, and can more than one person share a role. Journals across Elsevier, Cell Press, PLOS, and Frontiers now request a CRediT statement alongside (not instead of) an ICMJE-compliant author list, and several also publish CRediT contributions for non-author acknowledged contributors.

    Dimension ICMJE authorship criteria CRediT contributor roles
    Function Threshold test: qualifies for the byline or not Descriptive vocabulary: records specific tasks performed
    Structure 4 cumulative, all-or-nothing criteria 14 non-exclusive, combinable roles
    Who it covers Named authors only Authors and non-author contributors alike
    Steward International Committee of Medical Journal Editors NISO (ANSI/NISO Z39.104-2022), originated by CASRAI
    Resolves guest/ghost authorship? In theory, no — self-adjudicated and unverifiable at the criteria level Makes the mismatch visible: a “Writing” credit with no “Investigation” or “Formal analysis” role is a red flag

    The complementary use matters most in the disputed scenarios above. A CRediT statement that lists a senior author under Supervision only — with no Conceptualization, Investigation, Formal analysis, or Writing role — gives an editor or institutional investigator concrete evidence to test against the ICMJE’s four criteria, something a bare byline never could.

    Answer-first: common authorship questions

    What are the criteria for authorship in the ICMJE?

    The ICMJE requires all four criteria to be met: substantial contribution to conception, design, or data work; drafting or critical revision of the manuscript; final approval of the published version; and accountability for the work’s accuracy and integrity. Meeting only some criteria means acknowledgement, not authorship.

    What are the five criteria for authorship?

    Some sources describe “five criteria” by splitting the ICMJE’s fourth criterion — accountability — into two parts: taking responsibility for the work and confirming its integrity. The ICMJE’s own text remains four official criteria; the five-part version is a restatement, not a competing standard.

    What are the minimum requirements for authorship?

    COPE identifies two minimum requirements common to authorship definitions across disciplines: making a substantial contribution to the work, and being accountable for the work and its published form. These map directly onto ICMJE criteria 1 and 4.

    What are the guidelines for authorship?

    Authorship guidelines set who can be named on a publication and what they must do to earn that status. The dominant biomedical framework is the ICMJE’s four-criteria test, supplemented in practice by CRediT contributor-role statements and journal-specific policies aligned with COPE guidance.

    What this means for journals, institutions, and researchers

    For editors, ICMJE and CRediT serve different stages of one workflow: ICMJE decides the byline, CRediT documents the record. Requiring both at submission gives research-integrity offices a verifiable trail when a dispute later reaches them, since the ICMJE explicitly directs unresolved conflicts to the researchers’ institution, not the journal.

    For research administrators, a documented CRediT statement is often the fastest way to evidence individual contribution for funder and promotion-committee requirements, independent of authorship order.

    For early-career researchers and biostatisticians, raising criterion-2 access early — asking to review and comment on a draft — is the practical way to convert a CRediT-documented “Formal analysis” role into full ICMJE-qualifying authorship before submission, not after a dispute arises.

    Where authorship attribution is heading

    Neither framework is static. The ICMJE continues to revise its recommendations — most recently to address AI-assisted technology disclosure — and CRediT’s stewardship under NISO opens a formal maintenance path for role definitions as research practice evolves. The direction of travel is layering, not replacement: a qualitative gate for who is accountable, and a structured record of who did what.

    Journals, funders, and institutions that adopt both the CRediT taxonomy and ICMJE-aligned authorship policies give readers, editors, and integrity investigators the clearest possible picture of a paper’s provenance — something the four-point test was never designed to provide on its own. For definitions of individual roles, see the CRediT roles reference and the broader research-administration dictionary.