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2 years ago in Bibliometrics By Fern G
What is the difference between CiteScore, Impact Factor, and SNIP for journal metrics?
I'm evaluating journals to submit to and see "Impact Factor," "CiteScore," and "SNIP." They all seem to measure journal impact, but the numbers are different. Which one should I trust, and what does each actually measure?
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By Radhya Kumari Answered 1 year ago
Each metric serves a different purpose. Journal Impact Factor (JIF) from Clarivate's Journal Citation Reports calculates citations in a given year to citable items published in the prior two years. CiteScore from Scopus uses a three-year window and includes more document types (like notes and editorials). Because of these methodological differences, the numbers will vary. SNIP (Source Normalized Impact per Paper) is the most sophisticated for cross-field comparison, as it normalizes for the fact that some fields (e.g., molecular biology) cite more than others (e.g., mathematics). For practical journal selection, I recommend looking at the journal's quartile (Q1-Q4) within its specific subject category in either JCR or Scopus. This rank is more meaningful than the absolute number and accounts for field-specific norms.
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