The Journal Citation Report (JCR) includes the new Journal Impact Factors for 2022. The JCR is available through Web of Science, which is included in the Quick Links on the right side of the Sladen Library homepage.
Once you are in Web of Science, use the Products drop down list and select Journal Citation Reports to access the lists. You can search for a specific journal or display the entire list for a specific category/specialty. There are 59 categories listed for the Clinical Medicine group.
What are Journal Impact Factors?
The Journal Impact Factor is the number of citations from journals, proceedings, and books to citable items (articles and reviews) published in the previous two years for a given journal. Editorial material, letters and published meeting abstracts are not considered “citable items”, so they are not included in the impact factor calculation.
Example:
Journal A publishes 123 items in 2020 and 112 citable items in 2021 (total count of 235). These items are cited 1,593 and 975 times in 2022 (total count of 2,568). The 2022 Journal Impact Factor is 10.9.
What are Journal Impact Factors used for?
Journal Impact Factors are used to rank journals within a category and can help identify the impactful journals within a specialty. Journal Impact Factors can be used to identify potential journals for your publication. You can look at the target specialty/category for your manuscript and identify the top, middle and low tier journals.
What’s new for the 2022 Journal Impact Factors?
Previous Journal Impact Factors displayed 3 decimal places, but this year’s has been updated to include just 1 decimal place. This change will result in more ties in journal rankings, which will lead to uneven quartiles for journal categories as journals with the same impact factor cannot be split into different quartiles. The quartiles are determined by the number of ranked positions in the category, which is no longer the same as the number of journals in the category (ties were infrequent when calculated to 3 decimal places).
The 2022 release also sees the first calculated Journal Impact Factors for the Arts & Humanities Citation Index (AHCI) and the Emerging Sources Citation Index (ESCI). These journals won’t receive a position ranking or quartile ranking.
For more information about the Journal Citation Reports and the recent changes, check out the Journal Citation Reports Reference Guide and the Update Announcement from Clarivate.
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