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Large increases and decreases in journal impact factors in only one year: The effect of journal self‐citations

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  • Juan Miguel Campanario

Abstract

I studied the factors (citations, self‐citations, and number of articles) that influenced large changes in only 1 year in the impact factors (IFs) of journals. A set of 360 instances of journals with large increases or decreases in their IFs from a given year to the following was selected from journals in the Journal Citation Reports from 1998 to 2007 (40 journals each year). The main factor influencing large changes was the change in the number of citations. About 54% of the increases and 42% of the decreases in the journal IFs were associated with changes in the journal self‐citations.

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  • Juan Miguel Campanario, 2011. "Large increases and decreases in journal impact factors in only one year: The effect of journal self‐citations," Journal of the American Society for Information Science and Technology, Association for Information Science & Technology, vol. 62(2), pages 230-235, February.
    • Handle: RePEc:bla:jamist:v:62:y:2011:i:2:p:230-235
    DOI: 10.1002/asi.21457
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    Cited by:

    1. Yu, Tian & Yu, Guang & Wang, Ming-Yang, 2014. "Classification method for detecting coercive self-citation in journals," Journal of Informetrics, Elsevier, vol. 8(1), pages 123-135.
    2. Marcelo Mendoza, 2021. "Differences in Citation Patterns across Areas, Article Types and Age Groups of Researchers," Publications, MDPI, vol. 9(4), pages 1-23, October.
    3. Juan Miguel Campanario, 2018. "Journals that Rise from the Fourth Quartile to the First Quartile in Six Years or Less: Mechanisms of Change and the Role of Journal Self-Citations," Publications, MDPI, vol. 6(4), pages 1-15, November.
    4. Xue-Li Liu & Shuang-Shuang Gai & Jing Zhou, 2016. "Journal Impact Factor: Do the Numerator and Denominator Need Correction?," PLOS ONE, Public Library of Science, vol. 11(3), pages 1-15, March.
    5. Martin Szomszor & David A. Pendlebury & Jonathan Adams, 2020. "How much is too much? The difference between research influence and self-citation excess," Scientometrics, Springer;Akadémiai Kiadó, vol. 123(2), pages 1119-1147, May.
    6. Yi-Ching Liaw & Te-Yi Chan & Chin-Yuan Fan & Cheng-Hsin Chiang, 2014. "Can the technological impact of academic journals be evaluated? The practice of non-patent reference (NPR) analysis," Scientometrics, Springer;Akadémiai Kiadó, vol. 101(1), pages 17-37, October.
    7. Pajić, Dejan, 2015. "On the stability of citation-based journal rankings," Journal of Informetrics, Elsevier, vol. 9(4), pages 990-1006.
    8. Salustiano Martínez-Fierro & María Paula Lechuga Sancho, 2021. "Descriptive Elements and Conceptual Structure of Glass Ceiling Research," IJERPH, MDPI, vol. 18(15), pages 1-20, July.

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