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What are the purposes of journals?

They can be grouped into 4 basic functions:

  1. Register claims to original work
  2. Curate the research record including corrections and retractions
  3. Organize critical review
  4. Disseminate and archive scholarship    



Tools to Measure Journal Impact


Journal Citation Report also includes other metrics

  • Impact factor
  • 5-year impact factor- the average number of times articles from a journal published in the past five years have been cited in the chosen JCR year.
  • Immediacy index - average number of times an article is cited in the year it is published.
  • EigenFactor =  5 year impact factor + weighted highly cited titles and subtracts self-citations
  • Cited Half-Life – average age of citation in the given year
  • Article Influence Score – Eigenfactor x .01


Scopus/SciVal = Elsevier

  • SJR – SCImago Journal Rank
    • takes into account number of citations received by a journal
    • the prestige of the journal based on where citations come from.
  • SNIP – Source Normalized Impact per Paper
    • measures contextual citation impact
    • weighting citations based on the total number of citations in a subject field.
  • CiteScore - measures average citations received per document published in the serial.


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