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Provides citation data on science and social sciences journals. Helps users determine a publication’s impact and influence in the global research community.
Dates of Coverage: 1997 - Current
What do JCR calculations include?
Journal Impact Factor (JIF) - a calculation that looks at the number of citations to articles in the journal relative to the number of publications in that journal in a given year.
Eigenfactor Score – incorporates citation counts as well as the citation network structure.
Immediacy Index – the length of time it takes for articles in a journal to be cited.
What are the pros of Journal Impact Factor?
Widely accepted as a measure of the impact of a journal
What are the cons of Journal Impact Factor?
Does not indicate impact of individual publications within the journal
Journals with larger back files will have higher numbers
Cannot compare journals across different disciplines because of variations in citation practices