Bibliometrics and Impact Factor: SJR
This guide explains how impact factor is used and calculated in journal and article rankings, as well as other methods of citation analysis.
Paper on SJR
- The SJR indicator: A new indicator of journals' scientific prestigeby Borja Gonzalez-Pereira, Vicente Guerrero-Bote, Felix Moya-Anegon, December 2009
Background on SJR
The SCImago Journal & Country Rank is a portal that includes the journals and country scientific indicators developed from the information contained in the Scopus database (Elsevier).
The SJR was developed by SCImago from the Google PageRank algorithm.
- SCImagoA research group from the Consejo Superior de Investigaciones CientĂficas (CSIC), University of Granada, Extremadura, Carlos III (Madrid) and Alcalá de Henares.
What is SJR?
Developed by Professor Félix de Moya, Research Professor at Consejo Superior de Investigaciones Científicas, SCImago Journal Rank (SJR) is a prestige metric based on the idea that ‘all citations are not created equal’. With SJR, the subject field, quality and reputation of the journal has a direct effect on the value of a citation.
SJR
- Is weighted by the prestige of the journal, thereby ‘leveling the playing field’ among journals
- Eliminates manipulation: raise the SJR ranking by being published in more reputable journals
- ‘Shares’ a journal’s prestige equally over the total number of citations in that journal
- Normalizes for differences in citation behavior between subject fields
- SJRSJR was developed using Elsevier (Scopus) citation data. (open access)