CiteScore ( CS ) of an academic journal is a measure reflecting the yearly average number of citations to recent articles published in that journal. It is produced by Elsevier , based on the citations recorded in the Scopus database. Absolute rankings and percentile ranks are also reported for each journal in a given subject area.
13-640: 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. This enhanced methodology was introduced with the release of CiteScore 2019 in June 2020. At launch, CiteScore's neutrality
26-750: A CiteScore 2021 of 70.2: CS 2021 = Citations 2021 + Citations 2020 + Citations 2019 + Citations 2018 Publications 2021 + Publications 2020 + Publications 2019 + Publications 2018 = 338611 4823 = 70.2 {\displaystyle {\text{CS}}_{2021}={{\text{Citations}}_{2021}+{\text{Citations}}_{2020}+{\text{Citations}}_{2019}+{\text{Citations}}_{2018} \over {\text{Publications}}_{2021}+{\text{Publications}}_{2020}+{\text{Publications}}_{2019}+{\text{Publications}}_{2018}}={338611 \over 4823}=70.2} For example,
39-486: A CiteScore of 14.456 in 2017: CS 2017 = Citations 2017 Publications 2016 + Publications 2015 + Publications 2014 = 114639 7860 = 14.59 {\displaystyle {\text{CS}}_{2017}={{\text{Citations}}_{2017} \over {\text{Publications}}_{2016}+{\text{Publications}}_{2015}+{\text{Publications}}_{2014}}={114639 \over 7860}=14.59} Because
52-466: Is the definition of the "number of publications" or "citable items". Journal Citation Reports Journal Citation Reports ( JCR ) is an annual publication by Clarivate . 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
65-581: The 2017 CiteScores were reported first in 2018 when all data was available completely. CiteScores are typically released in late May, approximately one month earlier than the JCR impact factors. Scopus also provides the projected CiteScores for the next year, which are updated every month. Before 2020, the score was calculated differently: in a given year, the CiteScore of a journal was the number of citations received in that year of articles published in that journal during
78-465: The calculation method changed, knowing the calculation date is an important detail when comparing CiteScores. For example, the Nature CiteScore for 2017 calculated with the post-2020 method is 53.7. CiteScore was designed to compete with the two-year JCR impact factor, which is currently the most widely used journal metric. Their main differences are as follows: Book chapters Another difference
91-407: The detailed tables on microfiche . In general, various universities, administrative centers and ministries in charge of higher education make their evaluations of university professors and other researchers on the number and quality of articles published in journals indexed in the JCR. In recent years, it has often been released in mid-June. The 2017 Journal Citation Reports , based on 2016 data,
104-782: The journal during the same four-year period: CS y = Citations y + Citations y − 1 + Citations y − 2 + Citations y − 3 Publications y + Publications y − 1 + Publications y − 2 + Publications y − 3 {\displaystyle {\text{CS}}_{y}={{\text{Citations}}_{y}+{\text{Citations}}_{y-1}+{\text{Citations}}_{y-2}+{\text{Citations}}_{y-3} \over {\text{Publications}}_{y}+{\text{Publications}}_{y-1}+{\text{Publications}}_{y-2}+{\text{Publications}}_{y-3}}} For example, Nature had
117-513: The sciences and the social sciences; the 2013 science edition includes 8,411 journals, and the 2012 social science edition contains 3,016 titles. The issue for each year is published the following year after the citations for the year have been published and the information processed. The publication is available online ( JCR on the Web ), or in CD format ( JCR on CD-ROM ); it was originally published in print, with
130-566: The three preceding years, divided by the total number of "citable items" published in that journal during the three preceding years: CS y = Citations y Publications y − 1 + Publications y − 2 + Publications y − 3 {\displaystyle {\text{CS}}_{y}={{\text{Citations}}_{y} \over {\text{Publications}}_{y-1}+{\text{Publications}}_{y-2}+{\text{Publications}}_{y-3}}} For example, Nature had
143-841: Was originally published as a part of the Science Citation Index . Currently, the JCR , as a distinct service, is based on citations compiled from the Science Citation Index Expanded and the Social Sciences Citation Index . As of the 2023 edition, journals from the Arts and Humanities Citation Index and the Emerging Sources Citation Index have also been included. The information given for each journal includes: There are separate editions for
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#1732851853650156-456: Was questioned by bibliometrics experts like Carl Bergstrom , who found it appeared to favour Elsevier's titles over Nature's. 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
169-441: Was released on June 14, 2017. In April 2020, Journal Citation Reports included a beta for open access data, which uses Unpaywall data. It officially left the beta phase with the release of the 2020 JCR in June 2020. 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
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