Journal rankings or journal impact factors are used to measure and compare the influence of journals. Note that this measure applies at journal level, and not at article level.
Journal impact factors for individual journals may also be available from publishers' websites.
SCImago journal rankings (SJR) rank journals that are indexed in the Scopus Database. SJR measures the scientific influence of these scholarly journals, taking into account the number of citations received by a journal and the prestige of the journals where citations appear.
For more information on SJR please see Research Impact: Journal ranking
The Web of Science Database can be used to find the category and quartile impact factor rank of some journals. Quartile rankings are derived from journal impact factor data and journals are ranked within a subject category. Quartile 1 (Q1) is applied to the top 25% ranking journals in a particular subject category. Quartile 2 (Q2) is applied to journals whose rankings place them in the next 25%-50%, Quartile 3(Q3) is applied to those journals whose rankings place them in the 50%-75% distribution and Quartile 4 (Q4), the lowest position, is applied to those journals whose rankings place them in the bottom 25% distribution.
To find a quartile ranking:
In our example above, the Aquatic Sciences journal is ranked quartile 1 (Q1), the top quartile ranking, in the subject categories for Environmental Sciences, Limnology and Marine & Freshwater Biology.
Keep in mind that every evaluation method has limitations. Limitations for journal impact factor (JIF) include:
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