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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.
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]
The impact factor relates to a specific time period; it is possible to calculate it for any desired period. For example, the JCR also includes a five-year impact factor, which is calculated by dividing the number of citations to the journal in a given year by the number of articles published in that journal in the previous five years. [14] [15]
Impact factor. 1.2 (2022) Standard abbreviations ... According to the Journal Citation Reports, the journal had a 2022 impact factor of 1.2. [6] Format and scope
The Australian Political Studies Association (APSA) ranked academic publishers in 2007, taking into consideration both book and journal publication. [12] By 2022 this was replaced by a ranking of journal titles only.
Nature was one of the world's most cited scientific journals by the Science Edition of the 2022 Journal Citation Reports (with an ascribed impact factor of 50.5), [1] making it one of the world's most-read and most prestigious academic journals. [2] [3] [4] As of 2012, it claimed an online readership of about three million unique readers per month.
In any given year, the CiteScore of a journal is the number of citations, received in that year and in previous three years, for documents published in the journal during the total period (four years), divided by the total number of published documents (articles, reviews, conference papers, book chapters, and data papers) in the journal during the same four-year period: [3]
Impact factor 2022 [1] Website Trends in Biochemical Sciences: Trends Biochem. Sci. Biochemistry: Sannie Culbertson 1976 13.8 Trends in Biotechnology: Trends Biotechnol. Biotechnology: Matthew Pavlovich 1983 17.8 Trends in Cancer: Trends Cancer: Oncology: Danielle Loughlin 2015 18.4 Trends in Cell Biology: Trends Cell Biol. Cell biology: Ilaria ...