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This is the "Journal impact" page of the "Bibliometrics and citation analysis" guide.
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Last Updated: Nov 15, 2016 URL: Print Guide RSS Updates

Journal impact Print Page

Journal evaluation

The most common method for evaluating journals is bibliometric citation analysis, where the frequency of citations related to the "average article" in the journal, reflects the popularity and influence of the journal.  Various citation indicators have been developed to reflect perceived quality.  These can be found in journal ranking lists.


Journal ranking lists

Journal Citation Reports (JCR) rank journals based on citation data. JCR Science edition provides impact factors for over 7,300 journals in science and technology. JCR Social Science edition provides impact factors for over 2,200 journals in the social sciences.

Scopus Journal Analyzer also ranks journals based on citation data. Scopus indexes more than 17,000 journals across most disciplines.


Citation metrics for journals

Impact Factor (IF) is the most commonly used measurement to determine the reputation of a journal in relation to other journals in a specific field. The calculation of IF is based on the average number of times the articles of a journal is cited in a two/five year period.

SCImago Journal Rank (SJR) ranks journals included in the Scopus database. It calculates not only the number of citations to articles in journals but also takes into account the ‘quality’ of the citing journal.

Source Normalised Impact per Paper (SNIP) also ranks journals included in the Scopus database.  The SNIP citation indicator is normalised according to the subject field.  Citation counts in the Life Sciences tend to be higher than in the Arts and Humanities.  SNIP “levels the playing field”.

Eigenfactor journal metrics computes two principal scores - the Eigenfactor Score and the Article Influence Score which take into account the quality of the citing journal, the number of articles in each issue and the different citation patterns in different disciplines.


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