Journal Impact Factor
Journal Impact Factor (JIF) is an indicator of a journal’s scientific impact/visibility based on how often articles from the journal are cited.
A journal’s JIF is the average number of cites during one year to articles published the two preceding years.
JIF is found in Thomson Reuter’s Journal Citation Reports, and data is available for journals indexed in Web of Science.
JIF is an indicator which can be used for comparing journals. However, since citation patterns are very different between fields, comparisons should only be made with journals from the same field.
The distribution of citations to a journal are highly skewed, and the JIF of a journal is driven up by a small number of very highly cited articles. Therefore, JIF is not a good predictor of how much cited the individual article in a journal will be.
Althouse, B. M., West, J. D., Bergstrom, C. T. and Bergstrom, T. (2009), Differences in impact factor across fields and over time. J. Am. Soc. Inf. Sci., 60: 27–34. doi: 10.1002/asi.20936
Last updated: Mon Feb 06 12:31:27 CET 2017