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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 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 Science Citation Index Expanded (previously titled Science Citation Index) is a citation index originally produced by the Institute for Scientific Information and created by Eugene Garfield. The Science Citation Index (SCI) was officially launched in 1964, [ 1 ] and later was distributed via CD / DVD . [ 2 ]
The following is a partial list of scientific journals. There are thousands of scientific journals in publication, and many more have been published at various points in the past. The list given here is far from exhaustive, only containing some of the most influential, currently publishing journals in each field.
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]
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.
The journal is abstracted and indexed in the Chemical Abstracts Service, [6] the Science Citation Index Expanded, and selectively in Index Medicus/MEDLINE/PubMed. [7] According to the Journal Citation Reports, the journal has a 2023 impact factor 3.8. [8]
Within the scientific community, journal impact factors continue to play a large but controversial role in determining the kudos attached to a scientist's published research record. A list of over 14,000 journals was maintained by the ISI. The list included some 1,100 arts and humanities journals as well as scientific journals.