25 July 2012

Impact Factors 2011

At the end of last month, Thomson Reuters announced the release of the 2011 Impact Factors, available via the Journal Citation Reports (part of the Web of Knowledge).

The 2011 Impact Factor for a journal title is calculated as the average number of citations received in 2011 by articles published in that journal title during 2009 and 2010.

One interesting feature of the 2011 release was the exclusion of 51 journal titles due to "anomalous citation patterns" - it appears Thomson Reuters believed these journals to be engaging in practices designed to artificially inflate their Impact Factors.

For more information on Impact Factors, or guidance on finding out what the Impact Factor for a particular journal is, please contact your Information Specialist.

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