CASRAI Dictionary

Tag: statement of contribution example

  • Author Contribution Statement: Springer Example

    A Springer author contribution statement is a short, mandatory “Declarations” entry that names every author and describes what each one did, typically drafted in free-running prose rather than a checkbox grid. Springer bases the requirement on ICMJE’s four authorship criteria; CRediT’s 14 role labels are not a mandatory field on Springer-branded journals but can be woven into the required prose, and this guide shows exactly how, with a worked four-author example.

    An author contribution statement is a manuscript section, usually placed inside “Declarations” just before the reference list, that records the specific intellectual and practical work each named author contributed to a published paper.

    What Springer Actually Requires

    Springer Nature’s journal-policies page states plainly that “Springer portfolio journals encourage transparency by publishing author contribution statements” and that “authors are required to include a statement of responsibility in the manuscript, including review-type articles, that specifies the contribution of every author.” That single clause settles a common point of confusion: review articles are not exempt.

    The policy is explicitly built on two sources: the ICMJE authorship criteria and McNutt et al.’s “Transparency in authors’ contributions and responsibilities to promote integrity in scientific publication” (PNAS, 27 February 2018, DOI 10.1073/pnas.1715374115). Neither source mandates CRediT’s taxonomy — a distinction that matters for how you draft the statement, covered below.

    • All named authors must meet ICMJE’s four criteria: substantial contribution to conception/design or data acquisition/analysis; drafting or critical revision; final approval; and accountability for accuracy and integrity.
    • The statement is required for every manuscript type Springer publishes, including reviews, not just original research.
    • Springer permits two special designations within the statement: authors who “contributed equally” and co-authors who “jointly supervised the work.”

    Springer’s Standard Template Wording, and Where It Sits

    The statement belongs inside a section headed “Declarations,” positioned immediately before the reference list, alongside Funding, Conflicts of interest, Ethics approval, Consent, and Data/Code availability. Springer’s own Instructions for Authors documents supply sample wording that authors are told to “revise/customize” rather than copy verbatim.

    The most widely used Springer template, drawn from its Instructions for Authors and repeated across journal updates such as Applied Physics A, reads:

    Element Standard Springer wording
    Design “All authors contributed to the study conception and design.”
    Execution “Material preparation, data collection and analysis were performed by [full name], [full name] and [full name].”
    Drafting “The first draft of the manuscript was written by [full name] and all authors commented on previous versions of the manuscript.”
    Approval “All authors read and approved the final manuscript.”

    This four-line skeleton satisfies ICMJE’s criteria without naming a single CRediT role. It works well for small, tightly collaborative teams where the contribution split is not granular.

    Mapping CRediT’s 14 Roles onto Springer’s Prose

    CASRAI originated the CRediT contributor role taxonomy in 2014; it is now stewarded by NISO as ANSI/NISO Z39.104-2022. CRediT 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.

    Springer-branded journals do not run a mandatory CRediT dropdown at submission the way some other publisher platforms do; their policy language references ICMJE and the McNutt framework, not the CRediT taxonomy by name. That does not stop you from using CRediT vocabulary inside the required free-text Declarations paragraph — Springer’s guidance explicitly says the level of detail “varies” by discipline, which leaves room for a granular, role-labelled statement. The table below maps each CRediT role to the Springer template language it most naturally replaces.

    CRediT role Where it slots into Springer’s statement
    Conceptualization “contributed to the study conception and design”
    Methodology “contributed to the study conception and design”
    Investigation “material preparation, data collection”
    Formal Analysis “…and analysis were performed by”
    Data Curation “data collection and analysis”
    Writing – Original Draft “the first draft of the manuscript was written by”
    Writing – Review & Editing “all authors commented on previous versions”
    Supervision, Funding Acquisition, Project Administration added as a separate sentence naming the senior/corresponding author

    A Worked Four-Author Example

    Consider a four-author manuscript by A. Osei, B. Farrell, C. Nakamura, and D. Osei (senior/corresponding author), submitted to a Springer-branded journal. A Declarations entry combining Springer’s expected phrasing with explicit CRediT labelling reads:

    “Author contributions: A. Osei and D. Osei contributed to the study conception and design (Conceptualization, Methodology). Material preparation and data collection were performed by A. Osei and C. Nakamura (Investigation, Resources); formal analysis was performed by B. Farrell (Formal Analysis, Data Curation). The first draft of the manuscript was written by A. Osei (Writing – Original Draft) and all authors commented on and revised previous versions (Writing – Review & Editing). D. Osei acquired funding and supervised the project (Funding Acquisition, Supervision, Project Administration). All authors read and approved the final manuscript.”

    This single paragraph satisfies Springer’s ICMJE-derived requirement, sits correctly under the “Declarations” heading, and gives an editor, funder, or reader the granular CRediT-style detail that the plain four-line template omits — without inventing a field Springer does not have.

    Equal Contributions, Review Articles, and Group Authorship

    Three situations trip up first-time Springer authors most often.

    • Equal contributions: Springer permits a footnote or Declarations sentence naming authors who “contributed equally to the work,” distinct from any CRediT role.
    • Review articles: Springer’s journal-policies page names review-type articles explicitly — a synthesis or narrative review still requires a full statement of responsibility, even where no new data was generated.
    • Group/collaboration authorship: Where a consortium or working group is listed, the statement should name the individuals who led analysis and writing, then reference the group’s own authorship agreement for the remainder, following the same logic ICMJE applies to large collaborations.

    Answer-First Q&A

    What is the author contribution statement in Springer?

    It is a mandatory Declarations section entry, required on every Springer-branded manuscript including reviews, that names each author and states their specific contribution. Springer bases the requirement on ICMJE’s four authorship criteria and the McNutt et al. (2018) PNAS framework, not on a structured CRediT checkbox.

    What are examples of author contributions?

    Typical contributions include conception and design, data acquisition or analysis, drafting the manuscript, and critical revision — the four categories ICMJE requires every listed author to meet. CRediT’s 14 roles (Conceptualization, Investigation, Writing – Original Draft, and so on) offer a more granular vocabulary for describing the same work.

    How do you write an author’s contribution?

    Name every author using consistent initials or full names, state what each person specifically did (design, data collection, analysis, writing, supervision), and confirm that all authors read and approved the final manuscript. Keep the wording proportionate to discipline norms — concise for tightly collaborative teams, more granular for large or multi-role projects.

    Implications and What to Check Before Submission

    Institutions and research offices reviewing manuscripts before submission should check three things: the statement sits under “Declarations,” it names every listed author without exception, and its wording actually satisfies ICMJE’s four criteria rather than merely restating author order. Editors increasingly cross-reference contribution statements against authorship disputes and against funder compliance requirements, so vague or missing statements create downstream friction at proofing and post-publication correction stages.

    As more publishers move toward structured CRediT fields at submission, Springer-branded journals’ free-text convention is likely to converge with that model over time. Until then, the safest approach for authors is the one shown above: satisfy Springer’s exact phrasing requirement first, then layer in CRediT’s role vocabulary for the added precision institutions, funders, and readers increasingly expect. For the full role definitions referenced here, see the CRediT contributor roles reference and the broader CRediT taxonomy overview; for related authorship-order and eligibility conventions, see authorship guidance.

  • CRediT Contributor Roles Taxonomy: A PhD Student’s Guide to the 14 Roles

    The CRediT contributor roles taxonomy is a 14-role standardised vocabulary that names, precisely, what each person contributed to a research output — from Conceptualization and Investigation through to Writing – Original Draft and Supervision. For a PhD student assembling a first author contribution statement, the taxonomy replaces vague author-order conventions with an auditable, role-by-role record. Get it right and every collaborator, including your supervisor, is credited accurately; get it wrong — by over-claiming roles you did not perform, or omitting supervision entirely — and the statement can misrepresent the research record.

    CASRAI originated the CRediT contributor role taxonomy in 2014. The standard is now stewarded by NISO as ANSI/NISO Z39.104-2022, and journals including Elsevier, Wiley and Taylor & Francis have required or offered CRediT statements since 2015. This guide is written for doctoral and early-career researchers who are completing their first CRediT statement and need to know, specifically, where first-time authors go wrong.

    What Is the CRediT Contributor Roles Taxonomy?

    The CRediT contributor roles taxonomy is a controlled vocabulary of 14 defined roles used to describe the specific contributions each named author made to a research output. CRediT does not determine authorship — publishers apply separate authorship criteria, such as the four conditions set by the International Committee of Medical Journal Editors (ICMJE), and CRediT is layered on top once authorship has already been agreed.

    Each role can be assigned to more than one contributor, and one contributor can hold several roles. Many journals also let you record a degree of contribution — lead, equal, or supporting — alongside each role, which is particularly useful when a supervisor and a PhD student both contributed to the same role in different measures.

    For a first-time author, the practical implication is this: a CRediT statement is a factual record, not a courtesy credit. Every role you list should map to work you can actually describe if a co-author, editor, or your own supervisor asks you to justify it.

    The 14 CRediT Roles Explained for First-Time Authors

    The table below gives the official NISO definition for each role alongside a plain-language example of the kind of task a PhD student, rather than a principal investigator, typically performs under that role.

    CRediT Role Official Definition (NISO) Typical PhD-Student Example
    Conceptualization Ideas; formulation or evolution of overarching research goals and aims. Proposing a specific sub-question within a supervisor’s wider research programme.
    Data Curation Management activities to annotate, scrub, and maintain data for initial and later re-use. Cleaning and documenting a dataset for deposit in a repository.
    Formal Analysis Application of statistical, mathematical, computational, or other formal techniques. Running the statistical models and interpreting the output.
    Funding Acquisition Acquisition of the financial support for the project. Rarely a student role — usually the supervisor or grant-holder.
    Investigation Conducting the research and investigation process, including experiments or data collection. Running experiments, fieldwork, or interviews.
    Methodology Development or design of methodology; creation of models. Designing the study protocol under supervisory guidance.
    Project Administration Management and coordination responsibility for research activity planning and execution. Coordinating timelines with collaborators or a laboratory.
    Resources Provision of study materials, reagents, patients, samples, instrumentation, or tools. Sourcing samples, reagents, or specialist software licences.
    Software Programming, software development, and testing of code. Writing the analysis scripts or a data-processing pipeline.
    Supervision Oversight and leadership responsibility for research activity, including mentorship. Almost always the PI or supervisor — rarely the PhD student.
    Validation Verification of the overall replication or reproducibility of results. Re-running key analyses to confirm results before submission.
    Visualization Preparation of the published work, specifically data visualisation and presentation. Building the figures and charts for the manuscript.
    Writing – Original Draft Preparation of the initial draft, including substantive translation. Writing the first full draft of the manuscript.
    Writing – Review & Editing Critical review, commentary, or revision, including pre- or post-publication stages. Revising drafts after supervisor and co-author feedback.

    The Most Common CRediT Mistakes First-Time Authors Make

    First-time authors tend to make the same handful of errors, and most of them stem from completing the statement alone, at the last minute, without checking definitions against actual tasks performed.

    • Over-claiming Conceptualization or Funding Acquisition. If the research question, hypothesis, or grant came from your supervisor’s existing programme, the honest role is more often Investigation, Methodology, or Formal Analysis — not Conceptualization.
    • Omitting Supervision entirely. Because the student usually drafts the statement, the supervisor’s oversight and mentorship role is frequently left off. NISO’s definition explicitly covers “mentorship external to the core team” — this is a distinct, real contribution that should be recorded, not assumed.
    • Role inflation — listing every role “to be safe”. CRediT exists to make contributions legible, not to maximise how many roles appear next to your name. Claim only roles you can substantiate.
    • Conflating CRediT roles with authorship qualification. NISO states plainly that CRediT is not designed to determine authorship; a role in the taxonomy is not equivalent to meeting ICMJE’s four authorship criteria.
    • Finalising the statement without co-author sign-off. Wiley’s author guidance places responsibility on the submitting author to ensure all co-authors have reviewed and agreed their roles — skipping this step is a common source of later disputes.
    • Confusing the two writing roles. Writing the first full manuscript draft (Writing – Original Draft) is a separate role from revising it after feedback (Writing – Review & Editing); many students default to listing only one.

    How to Write Your First CRediT Statement

    Use this sequence rather than filling in the statement alone on submission day.

    1. Map your actual tasks to the 14 definitions first. Work from what you did, not from what would look impressive.
    2. Draft a preliminary list with a degree of contribution (lead, equal, or supporting) for each role, following the format used by publishers such as Wiley.
    3. Schedule a dedicated conversation with your supervisor early — ideally when the manuscript is drafted, not at the submission deadline — and explicitly ask whether Supervision should be recorded for them.
    4. Circulate the full statement to every co-author for review and agreement before submission; the submitting author is responsible for confirming everyone has signed off.
    5. Reference the definitions, not memory, if there is disagreement. Point to the specific NISO wording for the contested role.
    6. Escalate unresolved disputes through your institution rather than the journal — publishers typically do not arbitrate authorship or contribution disagreements, a position consistent with COPE’s authorship-dispute guidance.
    7. Paste the final, agreed statement into your target journal’s Author Contributions section in the format that journal requires.

    Common Questions First-Time Authors Ask About CRediT

    What are examples of author contributions?

    Typical examples include a first author credited for Investigation, Formal Analysis, and Writing – Original Draft, and a supervisor credited for Conceptualization, Funding Acquisition, and Supervision. A lab technician or collaborator might be credited only for Resources or Validation, reflecting a narrower, well-defined contribution.

    How do you write an author’s contribution statement?

    Map each author’s actual tasks against the 14 CRediT role definitions, note a degree of contribution where the journal allows it, then have every author review and agree the final wording before submission. The statement should describe real work, not seniority or author order.

    Where do author contributions go in a manuscript?

    Most journals place the CRediT statement in a dedicated “Author Contributions” section, usually just before the Acknowledgements or Funding statement and after the main text. Some journals, including several using the Elsevier and Wiley submission systems, capture it as structured metadata at submission rather than free text.

    Does a single-author paper still need a CRediT statement?

    Yes — publisher guidance, including Wiley’s, confirms a sole author should still complete a CRediT statement, though they need only list the roles that genuinely apply, since one person rarely performs all 14.

    As research assessment moves toward finer-grained recognition of individual contribution — visible in ORCID’s role-linking features and in institutional promotion cases that now cite specific CRediT roles rather than author position alone — an accurate first statement matters beyond a single paper. Treat it as the first entry in a contribution record you will build on throughout your career, not a box to tick before submission.

  • CRediT Contributor Roles Taxonomy Example: A 5-Author, Multi-Site Study Walkthrough

    A credit contributor roles taxonomy example works best as a full worked matrix: all 14 CRediT roles mapped against every named contributor, so that overlapping statistical, clinical, and writing work on a multi-author study becomes explicit rather than assumed from author order. This article builds that matrix, role by role, for a hypothetical five-author, three-site trial.

    CRediT (the Contributor Roles Taxonomy) is a fourteen-role controlled vocabulary for describing the specific type of contribution each named contributor made to a research output, independent of author order or seniority. CASRAI originated CRediT in 2014; the taxonomy is now formally stewarded by NISO as ANSI/NISO Z39.104-2022, approved in 2022 and licensed CC-BY 4.0 for free reuse by any publisher, funder, or institution.

    What is the CRediT contributor roles taxonomy?

    The CRediT contributor roles taxonomy lists fourteen discrete role types: Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, and Writing – review & editing. Any contributor can hold multiple roles, and any role can be shared by multiple contributors.

    Under the NISO standard, each shared role can optionally carry a degree-of-contribution qualifier:

    • Lead — this person did most of the work for that role
    • Equal — contribution was shared roughly evenly with named co-contributors
    • Supporting — a secondary, assisting contribution to that role

    These qualifiers are what make a worked example useful: a bare list of role names tells a reader little, but a role assigned “Lead” versus “Supporting” against a specific name tells them exactly how the work divided.

    The hypothetical study: a five-author, three-site trial

    To make the taxonomy concrete, consider a hypothetical trial: “Effects of a community-based exercise programme on cardiometabolic risk markers,” run across three sites — a lead university, a partner university running local recruitment, and an NHS trust providing the clinical setting. Five people are named as contributors:

    • Dr Amara Osei — Chief Investigator, lead university
    • Dr Rhys Bevan — Co-investigator and site lead, partner university
    • Dr Priya Nair — Biostatistician, lead university
    • Fatima Choudhury — Research nurse and clinical trial coordinator, NHS trust site
    • Dr Tomasz Wolski — Postdoctoral researcher, lead university

    This spread is deliberately realistic: it mirrors the multi-site, mixed-role structure of a typical funded clinical or field trial, where no single person can plausibly claim every contribution, and where author contributions examples published in journals routinely span exactly this kind of team.

    Role-by-role: assigning all 14 CRediT roles

    Working through each role in turn, rather than starting from “who is first author,” keeps the exercise honest. Below is the completed matrix for this hypothetical team.

    CRediT role Osei (CI) Bevan (Co-I) Nair (Statistician) Choudhury (Nurse/Coordinator) Wolski (Postdoc)
    Conceptualization Lead — — — Supporting
    Data curation — — Equal Equal —
    Formal analysis — — Lead — Supporting
    Funding acquisition Lead — — — —
    Investigation — Equal — Lead —
    Methodology Supporting Lead — — —
    Project administration — Lead — Supporting —
    Resources — — — Lead —
    Software — — Lead — —
    Supervision Lead — — — —
    Validation — — Lead — —
    Visualization — — Lead — Supporting
    Writing – original draft — — — — Lead
    Writing – review & editing Equal Equal — — Equal

    Reading the matrix

    Three things stand out that a title-only author list would hide. First, Dr Nair, the biostatistician, holds five roles (Formal analysis, Software, Validation, Visualization, and a shared Data curation) despite not being first or corresponding author. Second, Fatima Choudhury — a research nurse, not a doctoral-level academic — leads Investigation and Resources, reflecting that she ran the clinical site day-to-day. Third, no single person leads more than four roles; the workload is genuinely distributed across the three sites, which is precisely the pattern credit contributor roles taxonomy assignment is designed to surface.

    Writing the published CRediT statement

    Once the matrix is agreed, it converts directly into the “Author Contributions” text that journals such as Elsevier, Wiley, and Taylor & Francis titles require at submission:

    “Amara Osei: Conceptualization, Funding acquisition, Supervision, Methodology (supporting), Writing – review & editing (equal). Rhys Bevan: Methodology (lead), Investigation (equal), Project administration (lead), Writing – review & editing (equal). Priya Nair: Formal analysis, Software, Validation, Visualization, Data curation (equal). Fatima Choudhury: Investigation (lead), Resources, Data curation (equal), Project administration (supporting). Tomasz Wolski: Writing – original draft, Conceptualization (supporting), Formal analysis (supporting), Visualization (supporting), Writing – review & editing (equal).”

    This is a genuine statement of contribution example built directly from the matrix above — nothing in it needs to be reverse-engineered from a vague sentence like “all authors contributed equally,” which contributes no verifiable information at all.

    Common questions about CRediT contributor roles

    What is CRediT contributor role taxonomy?

    CRediT is a standardised, fourteen-role vocabulary for describing what each named contributor actually did on a research output, rather than relying on author position alone. It was originated by CASRAI in 2014 and is now formalised as ANSI/NISO Z39.104-2022, used across most major scholarly publishers at submission.

    What are the 14 CRediT contributor roles?

    The fourteen roles are Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, and Writing – review & editing. Multiple contributors can share any single role, each optionally marked lead, equal, or supporting.

    How do you write a contributorship statement?

    List every named contributor, then assign each of the fourteen CRediT roles they actually performed, using degree-of-contribution qualifiers where a role is shared. Agree the matrix among all co-authors before submission — the ICMJE and COPE both flag late, undiscussed contributorship claims as a common source of authorship disputes.

    In what order should authors be listed?

    Author order is a separate decision from CRediT roles and typically reflects relative overall contribution, with the corresponding author (often, but not always, first or last) taking responsibility for the submission. CRediT does not replace author order — it supplements it with role-level transparency that order alone cannot convey.

    Implications for multi-site studies — and what comes next

    Multi-site teams like the hypothetical trial above create a specific governance risk: contributions made at a partner site or NHS trust are structurally easy to under-credit if roles are assigned only by the lead institution after the fact. Building the matrix role-by-role, rather than writing a summary sentence, forces every site’s actual work — clinical coordination, statistical modelling, field recruitment — into the open before submission.

    For research offices and institutional repositories, a completed CRediT matrix is also increasingly machine-readable output metadata: DataCite and CrossRef schemas can carry contributor roles alongside ORCID iDs, feeding directly into research information systems without re-keying. As more funders request contributor-level reporting alongside authorship criteria, teams that build the habit of completing a full role matrix — not just a name list — will find compliance largely already done. Institutions building their own role-assignment workflows can start from the individual role definitions to check edge cases the matrix above does not cover.

  • Author Contribution Statement Frontiers Guide: What Open Peer Review Changes

    An author contribution statement for Frontiers is a mandatory, standardised disclosure — built on the CRediT taxonomy — that names each author’s initials against specific research tasks, placed just before the references. Because Frontiers also operates a collaborative, open peer review model in which reviewer identities are published alongside the article, that statement sits inside a visibly transparent record rather than behind a closed editorial process, raising the stakes for accuracy and completeness compared with journals that keep review closed.

    The Contributor Roles Taxonomy (CRediT) is a structured set of 14 standardised labels — from Conceptualization to Writing – Review & Editing — used to describe what each named author actually did on a manuscript, replacing vague free-text authorship blurbs with a checkable, comparable record.

    What does Frontiers require in an author contribution statement?

    Frontiers’ author guidelines make the Author Contributions Statement mandatory for every submission across its journal portfolio, including titles operated under Frontiers Partnerships. The statement must represent all named authors, briefly describe individual tasks, and identify each person by initials rather than full names — with a middle initial added where two authors share the same first and last initials (for example, REW and RSW).

    Practically, the submitting author enters each co-author’s contributions during the online submission process, and the system compiles them into the final statement, which is placed at the end of the manuscript, immediately before the References section. This mirrors the broader shift documented by publishers such as Elsevier and Wiley toward structured, submission-system-driven contribution capture rather than a free-text paragraph drafted after the fact.

    Frontiers’ authorship threshold is explicitly anchored to the International Committee of Medical Journal Editors (ICMJE) criteria: substantial contribution to conception or design, data acquisition, analysis or interpretation; drafting or critically revising the work; final approval of the version to be published; and agreement to be accountable for all aspects of the work. A CRediT-tagged contribution statement does not replace this authorship test — it documents what qualifying authors did, once they already qualify.

    What is CRediT, and where did it come from?

    CASRAI originated the CRediT contributor role taxonomy in 2014, in collaboration with journal publishers and research funders seeking a shared vocabulary for describing authorship work. The standard is now stewarded by NISO as ANSI/NISO Z39.104-2022, which is the current authoritative specification of the 14 roles and their definitions.

    Frontiers announced its adoption of CRediT on 20 July 2023, stating that the system “replaces the conventional free-text authorship descriptions with a standardized and transparent system that ensures consistency and accuracy in recognizing individual contributions.” Frontiers’ chief executive editor, Dr Frederick Fenter, framed the move as part of a wider commitment to openness within scholarly publishing.

    • Conceptualization
    • Data Curation
    • Formal Analysis
    • Funding Acquisition
    • Investigation
    • Methodology
    • Project Administration
    • Resources
    • Software
    • Supervision
    • Validation
    • Visualization
    • Writing – Original Draft
    • Writing – Review & Editing

    Each role can be assigned to more than one author, and a single author can hold multiple roles — the taxonomy is designed to reflect real research teams, where contributions overlap rather than divide neatly by job title.

    How does Frontiers’ open peer review model change the stakes?

    Frontiers runs a collaborative review process in which reviewers interact directly with authors during revision and reviewer names are published on the final article. That design choice matters for contribution statements: in a closed-review journal, an inaccurate or vague CRediT statement is checked, at most, by an anonymous editor and reviewers whose identities never surface. At Frontiers, the same statement sits on a page where the reviewers who scrutinised the work are named too, creating a fuller, mutually visible accountability chain from idea to publication.

    This does not mean reviewers audit CRediT tags line by line — Frontiers’ policy places that responsibility on the corresponding author — but it does mean the entire provenance record (who contributed what, and who reviewed it) is public and durable rather than partially hidden. For research integrity investigations, that visibility is a practical asset: a named reviewer trail alongside a role-based authorship record narrows the anonymity gap that closed models leave open.

    Feature Traditional closed peer review Frontiers’ collaborative open review
    Reviewer identity Anonymous to readers (and often to authors) Published with the article
    Author contribution statement Visible to readers, but reviewed only by an anonymous editor Visible to readers alongside named reviewers who assessed the work
    Post-publication scrutiny Contribution disputes are harder to trace to a specific review stage Named reviewer record supports faster provenance checks
    Incentive for precision Lower — statement rarely cross-checked publicly Higher — statement sits next to a public, named review record

    For research administrators advising on authorship disputes, this distinction is worth flagging explicitly: a Frontiers submission carries more public accountability infrastructure around a contribution statement than an equivalent closed-review journal, even though the CRediT taxonomy itself is identical across both.

    What does a compliant example look like?

    A CRediT-based Frontiers statement is typically compact — a handful of sentences, not a paragraph — and uses initials throughout. A representative, compliant format:

    “AB: Conceptualization, Methodology, Writing – Original Draft. CD: Investigation, Formal Analysis, Visualization. EF: Data Curation, Software. GH: Supervision, Funding Acquisition. All authors contributed to the article and approved the submitted version.”

    Three points distinguish a compliant statement from a weak one:

    • Every named author appears at least once — omitting a listed author from the statement is a common submission-checklist rejection reason.
    • Roles are drawn from the 14 standard CRediT labels, not invented descriptions (“helped with the project” is not a CRediT role).
    • The closing sentence confirming collective approval is retained, satisfying the ICMJE’s fourth authorship criterion on accountability.

    Common questions

    What is a contribution statement example?

    A contribution statement example lists each author’s initials against specific CRediT roles, such as “AB: Conceptualization, Writing – Original Draft.” It is a short, structured disclosure — typically two to five sentences — not a narrative account, and it appears at the end of the manuscript before the references.

    How do I write an author contribution statement?

    Assign each named author one or more of the 14 CRediT roles based on what they actually did, list contributions by initials, and add a closing line confirming all authors approved the submitted version. Frontiers’ online submission system compiles these entries automatically once authors provide them.

    Do you have to pay to publish in Frontiers?

    Yes — Frontiers is a gold open-access publisher and charges an article processing charge (APC) only after acceptance; no fee applies to rejected or withdrawn submissions. This fee transparency sits alongside the same openness principle that drives Frontiers’ published reviewer names and public contribution statements.

    Implications for authors and institutions

    Research offices advising authors on Frontiers submissions should treat the contribution statement as a document with two audiences at once: the editorial system checking ICMJE compliance, and a permanent public record sitting next to named reviewers. According to Frontiers Media’s own reporting on the Norwegian Scientific Index (NSD), 96 of its journals were listed in that register as of 2022 — a scale of output where standardised, auditable contribution data materially reduces the administrative burden of resolving authorship disputes after publication.

    Institutions building CRediT literacy into researcher training should note that the taxonomy’s value compounds under open models: a precise, role-based statement becomes machine-readable metadata that can feed ORCID records, funder reporting, and institutional repositories, not just a line in a PDF.

    Where this is heading

    As more publishers combine structured contributorship data with visible review provenance, the author contribution statement stops being a compliance formality and becomes part of a public integrity record. Frontiers’ pairing of mandatory CRediT statements with named, published reviewers is one live example of that shift — and a template other open-review adopters are likely to follow as funders and institutions push for fuller contributorship transparency.

    For the full 14-role reference and role definitions, see the CRediT taxonomy overview and the individual CRediT role pages. For the underlying authorship criteria that a contribution statement documents, see CASRAI’s authorship guidance.

  • Statement of Equal Author Contribution Template

    A statement of equal author contribution is a short, formal declaration — usually a footnote or a line in an “Author Contributions” section — that names two or more authors (most often co-first or co-senior authors) as having made equivalent, substantial contributions to a published work. It matters beyond the journal page: promotion, tenure, and grant committees increasingly read these statements literally, so vague or inconsistent wording is one of the most common triggers of authorship disputes at review time.

    A statement of equal author contribution is distinct from a full CRediT breakdown: the equal-contribution line establishes parity of standing (usually for author order), while a CRediT table documents which specific tasks each person performed. A defensible footnote uses both together.

    What is a statement of equal author contribution?

    A statement of equal author contribution is a footnote, superscript symbol, or dedicated sentence — typically attached to the byline or placed in an “Author Contributions” section — confirming that two or more listed authors contributed to the work to a comparable degree, despite appearing in a fixed order in the byline.

    Journals apply it most often to co-first authors, and less commonly to co-senior (co-last) authors. The International Committee of Medical Journal Editors (ICMJE) sets the underlying authorship bar: an individual must have made a substantial intellectual contribution, helped draft or critically revise the work, approved the final version, and be accountable for its accuracy. Equal-contribution wording sits on top of that bar — it does not replace it.

    How do you write a defensible equal-contribution footnote?

    A defensible footnote states plainly who is covered, uses unhedged wording, and is backed by a separate narrative or CRediT breakdown that a reviewer can cross-check. Ambiguity — not brevity — is what promotion committees flag.

    • Name who is covered. “These authors contributed equally” is acceptable only when exactly two authors are marked; for three or more, name them explicitly (e.g., “A.B., C.D. and E.F. contributed equally to this work”) to avoid a reader assuming it applies to the whole byline.
    • Pair it with a CRediT or narrative statement. JMIR’s editorial guidance recommends adding a narrative “Authors’ Contributions” section alongside the footnote in every case except when all authors on the paper contributed equally, where the footnote alone suffices.
    • Address author order separately. Equal contribution does not resolve who is listed first. State the method used — alphabetical, random, or by agreement — in the same footnote or an adjoining sentence, since committees weight first-author position heavily in tenure files.
    • Match the target journal’s exact format. Nature Portfolio, Cell Press, and PLOS each specify where the symbol goes (byline vs affiliation line) and what wording is accepted; deviating from house style is a common reason for a query at proofs stage.

    A minimal, defensible template:

    Author A1,*, Author B1,*, Author C2
    1Department/Institution, 2Department/Institution
    *These authors contributed equally to this work and are listed alphabetically.
    Author Contributions: A.B. and A.C. conceived the study and designed the methodology jointly; A.B. led data acquisition and formal analysis; A.C. led manuscript drafting and visualisation; both authors approved the final version and share responsibility for its accuracy.

    Which CRediT roles apply to co-first authors?

    CASRAI originated the CRediT contributor role taxonomy in 2014. The standard is now stewarded by NISO as ANSI/NISO Z39.104-2022, which defines 14 standard CRediT roles that can each carry a degree qualifier — lead, equal, or supporting. For co-first authors, marking overlapping roles “equal” is the most precise way to substantiate an equal-contribution footnote without relying on prose alone.

    CRediT role Author A (co-first) Author B (co-first)
    Conceptualization Equal Equal
    Methodology Lead Equal
    Investigation Equal Equal
    Formal analysis Supporting Lead
    Writing – original draft Lead Equal
    Writing – review & editing Equal Equal
    Visualization Supporting Lead

    This table is what makes an equal-contribution footnote defensible under scrutiny: a committee member can see precisely where the parity claim is supported and where the two authors’ work diverged, rather than taking a bare assertion of “equal contribution” on trust. See the full CRediT contributor role taxonomy for the complete 14-role list and definitions.

    How does the convention differ by discipline?

    Equal-contribution practice is not uniform across fields, and applying a biomedical template to a physics or economics manuscript is a frequent source of confusion for early-career researchers on interdisciplinary teams.

    Discipline Typical convention Author-order signal
    Biomedicine / life sciences Explicit footnote plus CRediT or narrative statement; co-first and co-senior both common First = most hands-on; last = senior/PI
    Physics / large collaborations Alphabetical author order by default, sometimes with a group-authorship line; individual footnotes rare Order carries little individual signal
    Economics Alphabetical order is the historical norm; the American Economic Association operates a registry allowing authors to certify that order was randomised, flagged with a superscript symbol Order is deliberately non-informative unless certified
    Humanities / social sciences Narrative contribution statements more common than symbols; equal-contribution footnotes are emerging practice, not yet standard Byline order often reflects seniority

    The American Economic Association’s randomised-order registry is a useful contrast case: it exists precisely because economics author order historically carried no contribution signal, so the association built a separate mechanism rather than retrofitting an “equal contribution” footnote onto every co-authored paper.

    What pitfalls trigger promotion-committee disputes?

    Most disputes trace back to a small set of avoidable errors, not to genuine disagreement about who did the work.

    1. Footnote and CV disagree. A CV that lists a paper as “first author” while the published footnote says “co-first, alphabetical” invites a committee to ask which claim is accurate.
    2. No named scope. “These authors contributed equally” without naming who, when more than two authors appear on the paper, leaves the claim open to challenge.
    3. Contribution and authorship criteria conflated. ICMJE authorship requires drafting/revision, final approval, and accountability — a CRediT “equal” tag in one role (e.g., data curation) does not by itself satisfy full authorship criteria.
    4. Retrospective changes. Adding an equal-contribution designation after acceptance, without journal sign-off, is treated by most editors — and by extension most committees — as a correction requiring formal disclosure, not a routine edit.
    5. Cross-cultural assumptions. Committees reviewing international collaborations sometimes misread alphabetical-order fields (physics, economics) as indicating unequal contribution; the footnote or a brief note explaining the field convention prevents this.

    Answer-first Q&A

    What is a contribution statement example?

    A typical example reads: “A.B. and C.D. contributed equally to this work. A.B. led data acquisition and formal analysis; C.D. led manuscript drafting and visualisation; both authors approved the final version.” It combines a plain equal-contribution sentence with a short, specific breakdown of tasks.

    Does equal contribution mean first author?

    No. Equal contribution addresses the degree of intellectual work, not byline position. Co-first authors are still listed in a specific order — commonly alphabetical, random, or by agreement — and that order can matter to readers and committees even when a footnote states the contributions were equivalent.

    How do you write equal contribution of authors?

    Name the covered authors explicitly, state the method used to decide byline order, and pair the footnote with a CRediT table or narrative “Author Contributions” section that a reader can independently verify. Match the exact wording and placement required by the target journal’s author guidelines.

    What is the corresponding author’s contribution?

    Per ICMJE, the corresponding author takes primary responsibility for communicating with the journal during submission, peer review, and publication. It is an administrative role, not necessarily a marker of seniority or greater intellectual contribution, and it can be held by any qualifying author, including a co-first author.

    Implications for committees and researchers

    As CRediT adoption spreads from biomedical publishers into physics, social science, and humanities venues, committees are increasingly asked to interpret contribution statements their evaluation criteria were not designed around. Committees that publish explicit guidance on weighting equal-contribution and CRediT-tagged roles — rather than defaulting to first-author-only counting — reduce the incentive for candidates to over-claim.

    A defensible statement of equal author contribution is never just a footnote: it is the footnote, a named scope, an explained order rationale, and a CRediT or narrative breakdown, all consistent with the CV and the authorship record under review. Building that consistency at submission time is cheaper than reconstructing it during a tenure dispute years later.