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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.
Journal Citation Reports (JCR) is an annual publication by Clarivate. [1] It has been integrated with the Web of Science and is accessed from the Web of Science Core Collection. It provides information about academic journals in the natural and social sciences, including impact factors. JCR was originally published as a part of the Science ...
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]
Clarivate Plc is a British-American publicly traded analytics company that operates a collection of subscription-based services, in the areas of bibliometrics and scientometrics; business / market intelligence, and competitive profiling for pharmacy and biotech, patents, and regulatory compliance; trademark protection, and domain and brand protection. [3]
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.
Clarivate previously marketed several subsets of this database, termed "Specialty Citation Indexes", [14] such as the Neuroscience Citation Index [15] and the Chemistry Citation Index, [16] however these databases are no longer actively maintained. The Chemistry Citation Index was first introduced by Eugene Garfield, a chemist by training.
Journal Citation Reports (JCR) is an annual publication by Clarivate. [47] It has been integrated with the Web of Science and is accessed from the Web of Science Core Collection. It provides information about academic journals in the natural and social sciences, including impact factors. JCR was originally published as a part of the Science ...
As of their 2022 list, Clarivate uses "performance statistics" from data in the Web of Science.There are 21 specific fields, and one for interdisciplinary science—Clarivate creates a list of papers that are in the top 1% most highly cited in their field, [a] and admission to the HCR list is based on an author's number of papers in the top 1%.