The integrated impact indicator revisited (I3*): a non-parametric alternative to the journal impact factor.

Autor/inn/en	Leydesdorff, Loet; Bornmann, Lutz; Adams, Jonathan
Titel	*The integrated impact indicator revisited (I3): a non-parametric alternative to the journal impact factor.**
Quelle	In: Scientometrics, (2019) 3, S.1669-1694 PDF als Volltext Verfügbarkeit
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0138-9130
DOI	10.1007/s11192-019-03099-8
Schlagwörter	Journal indicator; Percentile; Citation analysis; *; Journal impact factor
Abstract	Abstract We propose the I3* indicator as a non-parametric alternative to the journal impact factor (JIF) and h-index. We apply I3* to more than 10,000 journals. The results can be compared with other journal metrics. I3* is a promising variant within the general scheme of non-parametric I3 indicators introduced previously: I3* provides a single metric which correlates with both impact in terms of citations (c) and output in terms of publications (p). We argue for weighting using four percentile classes: the top-1% and top-10% as excellence indicators; the top-50% and bottom-50% as output indicators. Like the h-index, which also incorporates both c and p, I3-values are size-dependent; however, division of I3 by the number of publications (I3/N) provides a size-independent indicator which correlates strongly with the 2- and 5-year journal impact factors (JIF2 and JIF5). Unlike the h-index, I3 correlates significantly with both the total number of citations and publications. The values of I3* and I3*/N can be statistically tested against the expectation or against one another using chi-squared tests or effect sizes. A template (in Excel) is provided online for relevant tests.
Erfasst von	OLC
Update	2023/2/05