Journal citation indicator, introduced in 2021 by Clarivate in Journal Citation Reports
The Journal Citation Indicator will be calculated for all journals in the Web of Science Core Collection™ – including those that do not have a Journal Impact Factor (JIF)™ – and published in the 2021 JCR in June.
“The Journal Citation Indicator provides a single journal-level metric that can be easily interpreted and compared across disciplines.”
In its calculation for a given journal, the Journal Citation Indicator harnesses another Clarivate measure: Category Normalized Citation Impact (CNCI), a metric found in the analytic and benchmarking tool InCites™. The value of the Journal Citation Indicator is the mean CNCI for all articles and reviews published in a journal in the preceding three years. (For example, for the 2020 Journal Citation Indicator value, the years under analysis are 2017, 2018 and 2019.)
As in the CNCI measurement, the Journal Citation Indicator calculation controls for different fields, document types (articles, reviews, etc.) and year of publication. The resulting number represents the relative citation impact of a given paper as the ratio of citations compared to a global baseline. A value of 1.0 represents world average, with values higher than 1.0 denoting higher-than-average citation impact (2.0 being twice the average) and lower than 1.0 indicating less than average.
In essence, the Journal Citation Indicator provides a field-normalized measure of citation impact where a value of 1.0 means that, across the journal, published papers received a number of citations equal to the average citation count in that subject category.
https://clarivate.com/blog/introducing-the-journal-citation-indicator-a-new-field-normalized-measurement-of-journal-citation-impact/
More details at https://clarivate.com/download/introducing-the-journal-citation-indicator/
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