Authorship · Reference
What is contributorship?
Contributorship is the model of recording exactly what each person did on a research output, rather than relying on the binary signal of whether someone is named as an author — and it is what the Contributor Roles Taxonomy (CRediT) operationalises.
The step most authors miss
Doing CRediT right? Don’t stop at the statement.
A CRediT statement credits you inside one paper. The recognition CRediT was built for happens when those roles are tied to you, persistently. Sign in with your ORCID — free — and claim your CRediT contributions on casrai.org, the home of the standard. They become a verified, portable part of your identity, not a line that disappears into one PDF.
Free: claim your contributions, then export a journal-ready CRediT statement, schema.org structured data, JATS XML, CSV or BibTeX — and preview your public profile. A membership publishes that profile publicly and verifies the journals you serve.
From authorship to contributorship
The idea behind contributorship is older than CRediT. In 1997, an editorial in JAMA by Drummond Rennie and colleagues argued that the author byline was a fiction that concealed who actually did what, and proposed replacing it with a disclosure of contributions. Several major medical journals began collecting free-text contribution statements, but these were unstructured and not interoperable between journals.
Contributorship reframes the question. Instead of asking only "who is an author?", it asks "what did each person contribute?" — a more granular and more honest account that can recognise data managers, methodologists, software developers and others whose work might otherwise be hidden inside a single name in a byline.
CRediT: contributorship made machine-readable
The Contributor Roles Taxonomy (CRediT) is the controlled vocabulary that turns the contributorship idea into a standard. It defines 14 roles — from Conceptualization and Methodology to Writing, Supervision and Funding acquisition — and lets each contributor be tagged with the roles they held, optionally qualified as lead, equal or supporting. CRediT was introduced in a 2014 Nature paper, stewarded by CASRAI, and standardised as ANSI/NISO Z39.104-2022. It makes contributorship structured, interoperable and citable rather than a paragraph of prose.
How contributorship complements authorship
Contributorship does not replace authorship — it complements it. Authorship criteria, such as the ICMJE’s, still decide who qualifies to be an author; contributorship records what those authors (and sometimes acknowledged non-authors) actually did. The two answer different questions: authorship is about status and accountability, contributorship is about specific, attributable work. Most journals that use CRediT therefore ask for both an author list and a contributor-roles statement.
The contributorship statement
A contributorship statement (often a CRediT author statement) appears in the published paper and lists each named person with their roles — for example, "A.S.: Conceptualization, Methodology, Writing — original draft; B.D.: Data curation, Formal analysis". When captured as structured metadata it can flow to Crossref and ORCID, attaching verifiable contribution records to each researcher’s profile. A current limitation is that most publishers apply such statements only to named authors, leaving acknowledged contributors such as medical writers and technicians outside the model.
Key facts
At a glance
- Idea: record what each person did, not just whether they are an author
- Origin: proposed in a 1997 JAMA editorial (Rennie et al.)
- Standard: CRediT — ANSI/NISO Z39.104-2022, 14 roles
- Complements: authorship (who qualifies) rather than replacing it
- Statement: per-author role list, ideally as structured metadata
- Known gap: usually limited to named authors, not acknowledged contributors
Common questions
FAQ
What is contributorship?+
Contributorship is the practice of recording the specific contributions each person made to a research output, complementing the author byline with a structured, role-based account of who did what.
What is the difference between authorship and contributorship?+
Authorship is the formal status of being a named author and is decided by authorship criteria; contributorship records what each person actually contributed and can include people who do not reach the authorship threshold.
What is a contributorship statement?+
It is a statement in a publication that lists each named person alongside the roles they performed, most commonly expressed using the CRediT taxonomy and, ideally, captured as structured metadata.
How does CRediT relate to contributorship?+
CRediT is the standard that operationalises contributorship: a controlled vocabulary of 14 roles that makes the contributorship model structured, interoperable and citable.
Does contributorship replace authorship?+
No. It complements authorship. Authorship criteria still decide who qualifies as an author; contributorship records what those contributors did.
