CASRAI Dictionary

Tag: contribution statement

  • Resolving author-order disputes: prevention and the COPE approach

    Few conflicts in research are as common, or as bitter, as a dispute over who appears where on the author line. The stakes are real: in many fields position carries career-defining information, and a demotion from first to second author can shape a hiring or tenure decision. These disputes are also largely preventable, and where they are not, there is a well-established process for handling them fairly. This article covers both, drawing on the practical guidance at resolving authorship disputes and the conventions of author order.

    Why author order carries so much weight

    To prevent disputes you have to understand what is being fought over. In many disciplines, position on the author line is not decorative; it is information. By widespread convention, the first author is the person who contributed most — typically the researcher who did the bulk of the work and wrote the draft. The last author is, in many fields, the senior position: the principal investigator or laboratory head who supervised the work. The corresponding author takes responsibility for the manuscript through review and after publication and is the point of contact for the record. Other conventions exist — alphabetical ordering is standard in mathematics, economics, and parts of the humanities, where order carries no contribution signal at all.

    The trouble is that these conventions are field-specific, tacit, and sometimes contradictory. A collaboration spanning disciplines may contain people who each “know” a different rule. When the rule is unstated, the gap fills with assumption, and assumption is where disputes are born.

    Prevention: the single most effective measure

    The overwhelming majority of author-order disputes can be avoided by one practice: agreeing authorship and order early, explicitly, and in writing — and revisiting the agreement as the work evolves. An early conversation forces the tacit conventions into the open, surfaces disagreement while it is still small, and creates a record to refer back to. The conversation should cover who will be an author at all (under the field’s authorship criteria), the basis for ordering, who will be corresponding author, and how the agreement will be revised if contributions shift. Projects change; an authorship agreement made at the outset should be treated as living, not fixed.

    Almost every intractable author-order dispute traces back to a conversation that never happened. The five minutes of awkwardness in agreeing order at the start of a project is the cheapest insurance in research.

    How CRediT helps prevent and de-escalate

    A contribution statement does not, by itself, decide order — and it is important to be clear that CRediT does not encode author order. It records what each person did, not where they sit on the line. But that very transparency is a powerful preventive tool. When a team fills in a CRediT statement together, mapping each person’s work to the fourteen roles, the relative contributions become explicit and discussable on the basis of fact rather than feeling. A disagreement about order can then be grounded in “who did what”, which is far easier to resolve than a clash of unspoken expectations. CRediT will not tell you who should be first author; it will give you the shared, honest picture of contribution from which a fair ordering conversation can proceed.

    When prevention fails: the COPE approach

    Sometimes a dispute arrives anyway — a co-author objects to the order at submission, or a contributor demands to be added or removed, or a conflict erupts after acceptance. Editors are not left to improvise. The Committee on Publication Ethics (COPE) publishes flowcharts and guidance for exactly these situations, including changes to authorship after submission and disputes over who should be listed. The COPE approach has a consistent shape worth understanding:

    • The journal does not adjudicate the merits. Editors are not equipped, and have no standing, to decide who really contributed most. Their role is to ensure a fair, documented process, not to rule on the underlying contribution claim.
    • All listed and proposed authors must agree to any change. An author cannot be added, removed, or reordered without the documented agreement of all parties concerned.
    • The dispute is referred to the institution. Where authors cannot agree, COPE directs editors to ask the authors’ institution(s) to investigate, because the institution — not the journal — has the authority and the facts to resolve a contribution dispute.
    • The manuscript is paused, not pushed through. Publication is typically held until the dispute is resolved, so that the journal does not put its name to a contested authorship record.

    This division of labour is deliberate. The journal protects the integrity of the record by refusing to publish a disputed author list; the institution, which employs the people and holds the project records, does the fact-finding. Following the COPE flowchart gives editors a defensible, even-handed process and protects everyone involved from arbitrary decisions.

    A note on changing authorship after submission

    Requests to add or remove an author after submission are a frequent flashpoint and deserve particular care. A legitimate request — a contributor was genuinely overlooked, or a listed person turns out not to meet the criteria — should be handled transparently, with a clear written explanation and the agreement of all authors. A request that looks like a late attempt to add a guest author, or to remove someone out of conflict, is exactly the situation the COPE guidance is built to slow down and document. The bright line is the same one that governs authorship generally: the list must reflect genuine contribution and accountability, not convenience or pressure.

    Where shared vocabulary fits

    “First author”, “corresponding author”, “senior author”, and the meaning of order itself vary by discipline, and that variation is a frequent source of cross-field confusion. A shared, federated vocabulary that defines these roles and conventions precisely — pointing back to COPE for dispute handling and to ICMJE for the authorship criteria — is what lets collaborators from different fields negotiate on common terms. Supplying that definitional layer is the role the CASRAI dictionary is designed to play; the relevant terms sit in the research-integrity domain.

    Related reading

  • Co-first authorship and equal contribution: marking shared credit correctly

    Two researchers do roughly equal amounts of the central work on a paper, but only one name can physically come first on the author line. This is now an everyday situation in team science, and the conventional response is to declare the two authors equal contributors. Yet that declaration is recorded in many different ways, some of which barely survive indexing, and the result is that genuinely shared credit is frequently lost when it matters most — in a hiring or promotion committee reading the line. This article sets out how to mark shared credit correctly, building on the conventions described at author order and the role definitions at the CRediT roles.

    What “equal contribution” is claiming

    In most experimental and biomedical fields, position on the author line is information, not decoration. By widespread convention the first author did the bulk of the hands-on work and led the writing; the last author is the senior supervising figure. A co-first or equal-contribution designation is a deliberate intervention against that convention: it asserts that two (occasionally more) people share the leading-author role even though the linear author line can only print them one after another. The claim is specifically about leadership of the work, and it should be reserved for cases where it is genuinely true — not used as a courtesy to soften the awkwardness of ordering.

    It is worth being clear that equal contribution is field-specific. In mathematics, economics, and much of the humanities, authors are listed alphabetically and order carries no contribution signal at all, so an equal-contribution note is redundant. The designation does real work only where order is otherwise read as a ranking.

    The three places shared credit gets recorded

    Shared first authorship can be expressed through three distinct mechanisms, and the strongest practice uses them together rather than relying on any one.

    1. The author-line note

    The familiar device is a symbol against two or more names — commonly a superscript dagger or asterisk — resolving to a footnote that reads “These authors contributed equally to this work.” This is the human-readable signal a reader sees on the page. Its weakness is that it is presentational: the symbol and its note are not reliably captured as structured metadata, so a system harvesting the author list may record the two authors in their printed order and silently drop the equality. That is precisely how co-first status disappears downstream.

    2. The contribution statement, using the degree qualifier

    This is where a contribution taxonomy earns its place. The CRediT taxonomy supports an optional degree-of-contribution qualifier on every role assignment: lead, equal, or supporting. It is not a percentage and it does not weigh one role against another; it simply distinguishes who led a role from who shared or supported it. To record co-first authorship honestly, mark the relevant leading roles — typically Conceptualization, Investigation, Formal analysis, and Writing – original draft — as equal for both authors:

    Author A: Conceptualization (equal), Investigation (equal), Writing – original draft (equal). Author B: Conceptualization (equal), Investigation (equal), Writing – original draft (equal).

    This carries far more information than a footnote. It says which parts of the work were shared, and it does so in a form that can travel into structured systems. The qualifier is widely available in publisher submission systems, though rarely required, so you usually have to choose to use it.

    3. Order-neutral display where the venue allows

    A growing number of venues let authors indicate that the printed order of co-first authors may be swapped on individual CVs — the “authors may list their name first” convention. Where offered, this is a sensible complement to the two mechanisms above, because it acknowledges directly that the linear order does not encode a ranking between the equal contributors.

    A method for marking it correctly

    1. Confirm the claim is true. Equal contribution means the leading work was genuinely shared. If one person clearly led, say so with lead and supporting rather than reaching for equal.
    2. Decide the printed order on a transparent basis. Something has to come first. Agree the basis openly — alphabetical, coin-toss, or rotation across the group’s papers — and record that the order is not a ranking.
    3. Add the author-line note so a human reader sees the equality at a glance.
    4. Encode it in the CRediT statement with the equal qualifier on the shared roles, so the claim survives as structured data rather than as a presentational footnote.
    5. Have every named author confirm their own line before submission. Shared-credit claims are exactly where unconfirmed assumptions cause later disputes.

    Common mistakes

    • Relying on the footnote alone. A dagger and a note are fragile. Without the structured qualifier, the equality often does not survive into the systems that later read the author list.
    • Using “equal” to avoid an honest conversation. Declaring everyone equal because ordering is uncomfortable devalues the designation and misrepresents the work.
    • Confusing equal contribution with author order generally. CRediT records what each person did; it does not set author order, which remains a separate decision governed by your field’s conventions.
    • Forgetting the corresponding-author role. Corresponding authorship is a distinct responsibility and can sit with any author, including one of the co-first authors; settle it explicitly.

    Where shared vocabulary fits

    “Co-first”, “joint first”, “equal contribution”, and “shared senior author” are used loosely and recorded inconsistently across venues, which is exactly why the credit so often fails to travel. A shared, federated vocabulary that defines these designations precisely — and points back to NISO for the CRediT standard and its degree qualifier — is what lets an equal-contribution claim mean the same thing wherever it is read. Supplying that definitional layer is the role the CASRAI dictionary is designed to play; the relevant terms sit in the CRediT extensions domain.

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