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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 . As a journal-level metric, it is frequently used as a proxy ...
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 ...
Definition and purpose. The h -index is defined as the maximum value of h such that the given author/journal has published at least h papers that have each been cited at least h times. [4] [5] The index is designed to improve upon simpler measures such as the total number of citations or publications. The index works best when comparing ...
Scopus. Scopus is an abstract and citation database launched by the academic publisher Elsevier in 2004. [1] Journals in Scopus are reviewed for sufficient quality each year according to four numerical measures: h -Index, CiteScore, SJR ( SCImago Journal Rank) and SNIP ( source normalized impact per paper ).
Web of Science. The Web of Science ( WoS; previously known as Web of Knowledge) is a paid-access platform that provides (typically via the internet) access to multiple databases that provide reference and citation data from academic journals, conference proceedings, and other documents in various academic disciplines.
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. SJR is developed by the Scimago Lab, [5 ...
The BMJ is a weekly peer-reviewed medical journal, published by BMJ Group, which in turn is wholly-owned by the British Medical Association (BMA). The BMJ has editorial freedom from the BMA. [1] It is one of the world's oldest general medical journals. Previously called the British Medical Journal, the title was officially shortened to BMJ in ...
The values for Nature journals lie well above the expected ca. 1:1 linear dependence because those journals contain a significant fraction of editorials. 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: