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The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as indexed by Clarivate's Web of Science.
The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as indexed by Clarivate's Web of Science.
A study published in 2021 compared the Impact Factor, Eigenfactor Score, SCImago Journal & Country Rank and the Source Normalized Impact per Paper, in journals related to Pharmacy, Toxicology and Biochemistry. It discovered there was "a moderate to high and significant correlation" between them. [25]
A journal's SJR indicator is a numeric value representing the average number of weighted citations received during a selected year per document published in that journal during the previous three years, as indexed by Scopus. Higher SJR indicator values are meant to indicate greater journal prestige.
According to ScienceWatch, the journal was ranked first overall in the category of highest-impact journals (all fields) over 1995–2005 with an average of 161.2 citations per paper. [5] According to the Journal Citation Reports , the journal has a 2020 impact factor of 41.582, ranking it first out of 298 journals in "Biochemistry & Molecular ...
According to the Journal Citation Reports, the journal has a 2021 impact factor of 7.870, ranking it 6th out of 111 journals in the category "Business, Finance" and 16th out of 381 journals in the category "Economics". [2]
Science is the peer-reviewed academic journal of the American Association for the Advancement of Science [A 2] [1] (AAAS) and one of the world's top academic journals. [2] It was first published in 1880, is currently circulated weekly and has a subscriber base of around 130,000.
The average impact factor for general medicine and neuroscience is around 3. The only fields with an average impact factor above 4 are astronomy and molecular and cell biology. This doesn't mean that MCB journals are eight times better than mathematics and history journals, or that general medicine is three times better than orthopedic surgery.