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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.
Journal ranking is widely used in academic circles in the evaluation of an academic journal's impact and quality. Journal rankings are intended to reflect the place of a journal within its field, the relative difficulty of being published in that journal, and the prestige associated with it.
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.
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 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. [7] [8] Their main differences are as follows: [9]
JMIR mHealth and uHealth (2021 impact factor of 4.95) JMIR Serious Games (2021 impact factor of 3.36) JMIR Medical Informatics (2021 impact factor of 3.23) In June 2023, JMIR Publications announced that 14 of their 34 journals had received Impact Factors, many ranked in the top quartile (Q1) of their respective disciplines. [7]
According to the Journal Citation Reports the journal had a 2021 impact factor of 4.614, [10] but in February 2023, Clarivate delisted the journal in its main citation indexes (Science Citation Index Expanded and Social Sciences Citation Index), citing "publications that were deemed outside the scope of the journal".