Impact factor

The impact factor, also called the journal impact factor, is a journal ranking and scientometric index calculated by Clarivate's Web of Science. It reflects the yearly mean number of citations to articles published in the previous two years. Higher values are considered to indicate greater prestige or importance within a field. Universities and funding bodies often use it in promotion and research-proposal decisions, though it has been criticised for distorting scientific practices.

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Calculated by

Clarivate's Web of Science

Citation period

Articles published in the last two years

Use

Promotion and research proposal decisions