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Size matters! Association between journal size and longitudinal variability of the Journal Impact Factor

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  • Dorothea Koelblinger
  • Georg Zimmermann
  • Silke B Weineck
  • Tobias Kiesslich

Abstract

Analyses of the Journal Impact Factor (JIF) have grown to be a major topic in scientometric literature. Despite widespread and justified critique concerning the JIF and its application, the size of a journal as a predictor for its longitudinal variability–or stability–on a long-term level has not yet comprehensively been analyzed. This study aims to provide robust evidence for an association between JIF variability and the size of journals, expressed by the number of published articles (citable items). For this purpose, the complete set of journals included in the Incite Journal Citation Reports (JCR) with an JIF in the 2017 JCR edition (n = 8750) were analyzed for the association between journal size and longitudinal JIF dynamics. Our results, based on n = 4792 journals with a complete JIF data set over the timespan of 12 annual JIF changes show that larger journals publishing more citable items experience smaller annual changes of the JIF than smaller journals, yet with this association being reversed for journals with a very large number of total cites. Consequently and in accordance with the genuine intention of the JIF to serve as a basis for decisions on journal subscriptions, evaluation of current changes of the JIF have to be accompanied by consideration of the journal’s size in order to be accurate and sensible.

Suggested Citation

  • Dorothea Koelblinger & Georg Zimmermann & Silke B Weineck & Tobias Kiesslich, 2019. "Size matters! Association between journal size and longitudinal variability of the Journal Impact Factor," PLOS ONE, Public Library of Science, vol. 14(11), pages 1-9, November.
    • Handle: RePEc:plo:pone00:0225360
    DOI: 10.1371/journal.pone.0225360
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    Cited by:

    1. Tobias Kiesslich & Marlena Beyreis & Georg Zimmermann & Andreas Traweger, 2021. "Citation inequality and the Journal Impact Factor: median, mean, (does it) matter?," Scientometrics, Springer;Akadémiai Kiadó, vol. 126(2), pages 1249-1269, February.

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