Statistical Consultancy: Authorship or Credit?

Statistical consultancy

Substantive statistical advice or analysis provided by a statistician to a research project — including study design, sample-size calculation, analytic plan, model selection, code, or interpretation — that materially shapes the research's quantitative findings.

ByCASRAI Editorial Board

· Last updated 21 May 2026

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Where the statistical contribution rises to substantive intellectual input (designed the analysis, chose the methods, ran the models), authorship is warranted under most criteria; where it is bounded advice on a specific question, named acknowledgement is appropriate. CRediT distinguishes ‘Formal analysis’ from ‘Methodology’ to clarify the role.

References

NISO CRediT Standard (ANSI/NISO Z39.104-2022)
American Statistical Association Ethical Guidelines (2018)

Use in your systems

JATS XML <role> element

xml

<role vocab="credit"
      vocab-identifier="https://casrai.org/dictionary/"
      vocab-term="Statistical consultancy"
      vocab-term-identifier="https://casrai.org/dictionary/term/statistical-consultancy" />

Schema.org DefinedTerm (JSON-LD)

json

{
  "@context": "https://schema.org",
  "@type": "DefinedTerm",
  "@id": "https://casrai.org/dictionary/term/statistical-consultancy",
  "name": "Statistical consultancy",
  "identifier": "https://casrai.org/dictionary/term/statistical-consultancy",
  "description": "Substantive statistical advice or analysis provided by a statistician to a research project — including study design, sample-size calculation, analytic plan, model selection, code, or interpretation — that materially shapes the research's quantitative findings.",
  "inDefinedTermSet": "https://casrai.org/dictionary/domain/credit-extensions#set",
  "url": "https://casrai.org/dictionary/term/statistical-consultancy",
  "sameAs": [
    "Statistical advice",
    "Biostatistical consultancy"
  ],
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "publisher": {
    "@id": "https://casrai.org/#organization"
  },
  "dateModified": "2026-05-21T01:58:42",
  "inLanguage": "en"
}