Analysis of Aggregate Impact Factor Inflation in Ophthalmology

Caramoy, Albert; Korwitz, Ulrich; Eppelin, Anita; Kirchhof, Bernd; Fauser, Sascha

doi:10.1159/000343081

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…mean/median JIF changes >0%). While this effect is more pronounced for smaller journals, this observation is in accordance with several publications describing a general ‘inflation’ of the JIF over time [9, 17, 18].…”

Section: Discussionsupporting

confidence: 91%

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

et al. 2019

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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.

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Section: Discussionsupporting

confidence: 91%

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

et al. 2019

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The temporal change of citation practice and its influence on the Journal Impact Factor.

Kodama

ONODERA

2015

Journal of Japan Society of Information and Knowledge

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This paper analyzes the temporal change in the number of references per paper and the citation age distribution, and their influence on the macroscopic Journal Impact Factor (JIF) in natural science field and its subfields. The target is limited to 4463 journals that are continuously indexed by Journal Citation Reports from 2001 to 2009, in order to eliminate the influence of journal replacement. In the whole natural science field, all-aged references per paper continuously increase, but the increase in 1and 2-aged references per paper is slight, meaning that older-aged references mainly contribute to the 情報知識学会誌 increase in references per paper. The change in JIF in the natural science field was affected by both 1and 2-aged references per paper and the paper-growth rate, stronger by the latter. All-aged references per paper increase in the every subfield, but 1-and 2-aged references per paper increase in some subfields and decrease in others. The difference in the changing rate of JIF among subfields is affected the most strongly by the changing rate of 1-and 2-aged references per paper, next by the changing rate of paper-growth rate. The proportion of inter-subfield citations dose not have a significant effect.

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The temporal change of citation practice and its influence on the Journal Impact Factor.<b> </b>

Tadashi

Onodera

2015

Journal of Japan Society of Information and Knowledge

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Analysis of Aggregate Impact Factor Inflation in Ophthalmology

Cited by 3 publications

References 35 publications

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

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

The temporal change of citation practice and its influence on the Journal Impact Factor.

The temporal change of citation practice and its influence on the Journal Impact Factor.<b> </b>

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