Abstract: |
The Journal Impact Factor (JIF) is a widely used metric for ranking journals
based on the number of citations garnered by papers published over a specific
timeframe. To assess the accuracy of JIF values, I compared citation counts
for 20 of my own publications across six major bibliography databases:
CrossRef, Web of Science, Google Scholar, Scopus, PubMed, and Publishing
journal records. The analysis revealed noteworthy variations in citation
counts, ranging from 10% to over 50% between the lowest and highest citation
counts. Google Scholar records the highest citation numbers, while PubMed
reported the lowest. Notably, Web of Science, whose citation data are used in
JIF calculations, tend to underestimate citation counts compared to other
databases. These findings raise concerns about the accuracy of JIF
calculation, as currently based on Web of Science’s citation data. The real
JIF values for most journals would differ from those annually reported by
Clarivate's journal citation reports (JCR). These observations underscore the
importance of comprehensive data collection and the necessity to include
additional citation sources. Clarivate Analytics may need to consider
integrating all citation sources for more accurate JIF values. Alternatively,
Google Scholar could potentially develop its own journal or citation impact
based on its extensive journal citation records. |