Journal Impact Factor (JIF)
JIF is the average number of citations received by articles published by a journal. The calculation is based on citations received in the current year by articles published in the previous two years. JIF should not be used to compare journals in different disciplines. Below is an example of the JIF of the Journal of the Learning Sciences:
5-Year Journal Impact Factor
The 5-Year Journal Impact Factor is the same as Journal Impact Factor except that its calculation uses citation numbers in the past five years, not two as in the standard Journal Impact Factor.
Journal Citation Indicator (JCI)
JCI is a normalized indicator considering citations in a recent 3-year period. The average JCI of all categories is approximately 1. A journal with a JCI of 1.9 has 90% more citation impact than the average in that specific category. Unlike Journal Impact Factor, JCI allows comparisons of journals across disciplines.
All journal metrics, including JIF and JCI, can be found in a journal profile.
You can find a list of journals under a research category.
Web of Science comprises multiple databases that provide citation data for many different research disciplines.
Journal metrics published in Journal Citation Reports are calculated based on the Web of Science Core Collection.