A new approach to the metric of journals’ scientific prestige: The SJR indicator |
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| Authors: | Borja González-Pereira Vicente P Guerrero-Bote Félix Moya-Anegón |
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| Institution: | 1. SRG SCImago Research Group, Spain;2. University of Extremadura, Department of Information and Communication, Scimago Group, Spain;3. CSIC, CCHS, IPP, Scimago Group, Spain;1. Servicio de Neumología, Hospital Universitario 12 de Octubre, Madrid, España;2. Departamento de Historia de la Ciencia y Documentación, Facultad de Medicina y Odontología, Universidad de Valencia, Valencia, España;3. Unidad de Información e Investigación Social y Sanitaria (UISYS), CSIC-Universidad de Valencia, Facultad de Medicina, Valencia, España;1. CSIC, SCImago Research Group Associated Unit, Faculty of Communication and Documentation, Campus de Cartuja s/n, 18071 Granada, Spain;2. University of Ljubljana, Faculty of Mathematics and Physics, Jadranska 19, 1000 Ljubljana, Slovenia;3. University of Granada, Department of Information and Communication, Faculty of Communication and Documentation, Campus de Cartuja s/n, 18071 Granada, Spain;4. CSIC, Institute of Public Goods and Policies, Albasanz 26-28, 28037 Madrid, Spain;5. SCImago Research Group, Spain;1. SIRIS Lab, Research Division of SIRIS Academic, 08003 Barcelona, Spain;2. Universidad de Vigo, Atlantic Research Center for Information and Communication Technologies; Campus Universitario, 36310 Vigo, Spain;1. Library, Nanjing Medical University, Nanjing, 210029, China;2. State Key Laboratory of Analytical Chemistry for Life Science, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210023, China;1. Facultad de Comunicación y Documentación, Universidad de Granada, Granada, Spain;2. Universitat Politècnica de València, Valencia, Spain;3. Statistical Cybermetrics Research Group, School of Mathematics and Computer Science, University of Wolverhampton, Wolverhampton, UK |
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| Abstract: | A size-independent indicator of journals’ scientific prestige, the SCImago Journal Rank (SJR) indicator, is proposed that ranks scholarly journals based on citation weighting schemes and eigenvector centrality. It is designed for use with complex and heterogeneous citation networks such as Scopus. Its computation method is described, and the results of its implementation on the Scopus 2007 dataset is compared with those of an ad hoc Journal Impact Factor, JIF(3y), both generally and within specific scientific areas. Both the SJR indicator and the JIF distributions were found to fit well to a logarithmic law. While the two metrics were strongly correlated, there were also major changes in rank. In addition, two general characteristics were observed. On the one hand, journals’ scientific influence or prestige as computed by the SJR indicator tended to be concentrated in fewer journals than the quantity of citation measured by JIF(3y). And on the other, the distance between the top-ranked journals and the rest tended to be greater in the SJR ranking than in that of the JIF(3y), while the separation between the middle and lower ranked journals tended to be smaller. |
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