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Journal Impact Factor (JIF)

An annual journal-level metric, published by Clarivate in the Journal Citation Reports, equal to the average number of citations in a given year to articles published in that journal during the preceding two years.

ByCASRAI Editorial Board
· Last updated 21 May 2026

Examples

Worked examples

  • Is an instance

    Citing JIF transparently as a journal-level metric in a library subscription review.

  • Is an instance

    Publishing a journal's citation distribution alongside its JIF, per Lariviu00e8re et al.'s proposal.

Counter-examples

Looks similar, but isn't

  • Not an instance

    Setting a JIF floor as a requirement for promotion, tenure, or hiring.

  • Not an instance

    Comparing a humanities researcher's outputs to a biomedical researcher's using JIF.

Editorial commentary

The Journal Impact Factor was introduced by Eugene Garfield in the 1950s-1960s as a librarian's tool to compare journals for collection-development decisions. The two-year JIF is computed by dividing the count of citations received in year Y to items published in years Y-1 and Y-2 by the number of citable items in those years. The metric is mathematically inappropriate as a measure of the quality of individual articles or researchers because citation distributions within a journal are highly skewed: a small number of papers typically attract most citations. DORA and the Leiden Manifesto cite JIF misuse as the paradigmatic example of irresponsible metric use.

References

  • Clarivate Journal Citation Reports. Larivière V et al. 'A simple proposal for the publication of journal citation distributions', bioRxiv, 2016. DORA recommendations.

Also known as

JIF · Impact Factor · ISI Impact Factor

Machine-readable encodings

Use in your systems

JATS XML <role> element
xml
<role vocab="credit"
      vocab-identifier="https://casrai.org/dictionary/"
      vocab-term="Journal Impact Factor (JIF)"
      vocab-term-identifier="https://casrai.org/dictionary/term/journal-impact-factor" />
Schema.org DefinedTerm (JSON-LD)
json
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  "inDefinedTermSet": "https://casrai.org/dictionary/domain/responsible-assessment#set",
  "url": "https://casrai.org/dictionary/term/journal-impact-factor",
  "sameAs": [
    "JIF",
    "Impact Factor",
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  "license": "https://creativecommons.org/licenses/by/4.0/",
  "publisher": {
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  "dateModified": "2026-05-21T02:22:55",
  "inLanguage": "en"
}

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