Thomson Reuters releases 2013 Journal Citation Reports

Thomson Reuters has released the 2014 Journal Citation Reports containing the 2013 journal metric data.

 Journal Citation Reports®, is an unique Web-based research tool that allows you to evaluate and compare journals using citation data drawn from approximately 12,000 scholarly and technical journals and conference proceedings from more than 3,300 publishers in over 80 countries. Journal Citation Reports includes virtually all specialties in the areas of science, technology, and social sciences.

Expanded Metrics and Features

5-Year Journal Impact Factor is the average number of times articles from a journal published in the past five years have been cited in the JCR year. For journals in subjects where citation activity continues to rise through several years, this metric allows more of their total citation activity to be included in a critical performance metric.

Eigenfactor® Metrics, comprising the Eigenfactor® Score and Article Influence® Score, use JCR citation data to assess the influence of a journal in relation to other journals. These metrics, based on five years of citation activity, consider not just the count of citations but the structure of the citation network. Eigenfactor Metrics are available only for JCR years 2007 and later.

Journal Self Cites provides analyses of journal self citations and their contribution to the Journal Impact Factor calculation.

Rank-in-Category reveals the ranking of a journal in its subject categories based on the Journal Impact Factor. An accompanying Impact Factor box plot depicts the distribution of Impact Factors for all journals in a category.

For more information please review the release notes or contact Web of Science  at
wok@mimas.ac.uk

Happy Birthday Science Citation Index!

The Science Citation Index (SCI), a key component of the Web of Science Core Collection, is 50 today!

From an idea by Dr Eugene Garfield in 1955 [1], the SCI was first published in 1964 as a five-volume print edition of indexed scientific work.  This was made available online in 1972, quickly followed by the Journal Citation Reports in 1975. 

Thomson Reuters have created a 50th anniversary web page with more information, a full timeline, and some vintage video instructions!

1. Garfield, E. (1955). Citation Indexes for Science: A New Dimension in Documentation through Association of Ideas. Science, 122 (3159),108-11.

2012 edition of Journal Citation Reports now available

The 2012 edition of the Journal Citation Reports from Thomson Reuters has now been published.  This will give you the most up-to-date Impact Factors for world-leading journals indexed by the Web of Science.

The Impact Factor for a journal is the average number of citations per article published in that journal.  The 2012 edition considers citations during 2012 to articles published during 2010 and 2011.

You can access the Journal Citation Reports by clicking on the Additional Resources tab within the Web of Knowledge, or directly via the A-Z Resource List.

If you would like further information about Impact Factors, the Journal Citation Reports, or bibliometrics in general, please contact your Information Specialist.

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.