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The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as indexed by Clarivate's Web of Science.
the number of times articles published in the journal during each of the most recent 10 years were cited by individual specific journals during the year (the twenty journals with the greatest number of citations are given) and several measures derived from these data for a given journal: its impact factor, immediacy index, etc.
The list given here is far from exhaustive, only containing some of the most influential, currently publishing journals in each field. As a rule of thumb, each field should be represented by fewer than ten positions, chosen by their impact factors and other ratings.
A study published in 2021 compared the Impact Factor, Eigenfactor Score, SCImago Journal & Country Rank and the Source Normalized Impact per Paper, in journals related to Pharmacy, Toxicology and Biochemistry. It discovered there was "a moderate to high and significant correlation" between them. [25]
The following is a partial list of lists of academic journals. Lists of journals. By topic. List of academic journals about specific authors; List of accounting ...
While these journals still did not receive an impact factor until the next year, they did contribute citations to the calculation of other journals' impact factors. [4] [5] In July 2022, Clarivate announced that journals in the ESCI obtain an impact factor effective from JCR Year 2022 first released in June 2023. [6]
This journal evaluation metric was launched in December 2016 as an alternative to the Journal Citation Reports (JCR) impact factor (IF), calculated by Clarivate. CiteScore is based on the citations collected for articles published in the preceding four years, instead of two or five in the JCR IF.
A journal's SJR indicator is a numeric value representing the average number of weighted citations received during a selected year per document published in that journal during the previous three years, as indexed by Scopus. Higher SJR indicator values are meant to indicate greater journal prestige.