SNIP

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ROAD resources covered by SNIP: http://road.issn.org/issn_search?afs:filter=referencing%3D"SNIP"

Name: SNIP (Source Normalized Impact per Paper)

Category of service: journal indicators

Owner:  Centre for Science and Technology Studies, Leiden University (CWTS, Netherlands). CWTS indicators are based on the Scopus bibliographic database produced by Elsevier.

URL: http://www.journalmetrics.com/snip.php

Other indicators calculated by CWTS:  RIP (raw impact per publication); P (number of publications of a source in the past three years); % self cit (percentage of self citations of a source)

Coverage: international, multidisciplinary

Number of publications covered: around 20 000

Creation date: 2009 (revised in 2012)

Methodology: http://www.journalmetrics.com/faq.php

Lists of CWTS indicators: http://www.journalmetrics.com/about-journal-metrics.php

Reference documents: 

- Some modifications to the SNIP journal impact indicator (Ludo Waltman, Nees Jan van Eck,Thed N. van Leeuwen, Martijn S. Visser, 2013)
http://dx.doi.org/10.1016/j.joi.2012.11.011
http://arxiv.org/abs/1209.0785 (preprint)

- Measuring contextual citation impact of scientific journals (Henk F. Moed, 2009)
http://dx.doi.org/10.1016/j.joi.2010.01.002
http://arxiv.org/abs/0911.2632

 

Last update: September 2015