June 17, 2010 – 2009 data has now been loaded into
JCR - Journal Citation Reports from Thomson Reuters Web of Knowledge
. Journal Citation Reports allows you to evaluate and compare journals using citation data drawn from over 9,100 scholarly and technical journals from more than 3,300 publishers. It can show you the most frequently cited journals in a field, highest impact journals in a field, and largest journals in a field. Search or browse in JCR Science Edition or JCR Social Sciences Edition. The library does not subscribe to the Arts & Humanities Edition.
In the past three years, more than 1,600 journals that focus on topics of regional interest have been added to Web of Science. Data used to calculate JCR metrics include citations from these journals. In addition, several of these titles are included in the list of new titles available in the 2009 JCR. Information about the new regional content in JCR has been posted on the ISI site.
The latest edition delivers:
- More than 9,100 of the world's highly cited, peer reviewed journals
- More than 850 regional journals included as part of the Regional Content Expansion initiative
- 1,055 journals with their first published Journal Impact Factor
- Journals from over 2,200 publishers in 230 disciplines, from 78 countries
- Updates to the latest metrics and features that enhance your understanding of a journal's influence: Five Year Impact Factors and Eigenfactor metrics, Rank-in-Categories Tables, Journal self-citations, and Impact Factor boxplots.
We also link to Impact Factors (when available) from Addison. See also our earlier announcement on using JCR for promotion and tenure processes.
New metrics and features in JCR
- 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.
- The 2009 JCR data (Science and Social Sciences editions combined) contain 38 journals with new titles in 2009 resulting from a publication changing title, merging with another title or splitting into two or more separate titles.
- Because the Journal Impact Factor calculation uses two prior publication years, titles that were altered in 2008 are also affected. 38 such titles are still visible in the 2009 Journal Citation Reports.
- To see a full list of 2008 and 2009 title changes:
- From the Welcome page, if you select View a group of journals…, Search for a specific journal, or View all journals, the resulting screen will contain a link to Journal Title Changes that are specific to the edition and year of the JCR in which you are working.
- In addition, any individual journal record that is affected by a year 2008 or year 2009 title change will contain a title changes link in the Full Journal Record in the Journal Information section. This will note the specific nature of the change as well as the other title/titles involved.
Thompson provides screencasts of training sessions online about recent JCR enhancements, how Impact Factors are calculated, and the Immediency Index.