Welcome to Journal Citation Reports®, a 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 is the only source of citation data on journals, and includes virtually all specialties in the areas of science, technology, and social sciences.
This release of Journal Citation Reports provides 2013 data. The 2014 data will be made available in the 2015 Journal Citation Reports release.
Journals appearing in JCR
A complete list of the titles covered in this year's JCR is available at: http://scientific.thomsonreuters.com/imgblast/JCRFullCovlist-2014.pdf.
A list of journals receiving their first Impact Factor is available at: http://scientific.thomsonreuters.com/imgblast/JCR-newlist-2013.pdf
After JCR data were published in July 2014, we were able to obtain materials whose absence had prevented journals from receiving a Journal Impact Factor, as well as to correct metrics for a small number of journals. The 2013 JCR data (2014 release) are now complete and all updates have been fully incorporated into the product.
· 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.
· To see a full list of 2012 and 2013 title changes:
o 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.
o In addition, any individual journal record that is affected by a year 2012 or year 2013 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.
· The titles listed below are published in individually titled sections. The individual sections are listed in Web of Science according to their unique titles. For the purposes of JCR listing, the sections are combined and the parent title is retained with a single Journal Impact Factor that combines item counts and citation data for all sections. The decision to combine sections to a single JCR listing is based on JCR Editors' analysis of citation aggregation effectiveness.
o J GEOPHYS RES-ATMOS, J GEOPHYS RES-BIOGEO, J GEOPHYS RES-EARTH, J GEOPHYS RES-OCEANS, J GEOPHYS RES-PLANET, J GEOPHYS RES-SOL EA, and J GEOPHYS RES-SPACE are combined to: J GEOPHYS RES
o TIERAERZTL PRAX G N and TIERAERZTL PRAX K H are combined to TIERAERZTL PRAX
o TISSUE ENG PART B-RE, TISSUE ENG PART C-ME and TISSUE ENG PT A are combined to TISSUE ENG
Metrics for the titles listed below are not published in the 2013 JCR data due to anomalous citation patterns found in the 2013 citation data. These patterns result in a significant distortion of the Journal Impact Factor and rank that does not accurately reflect the journal’s citation performance in the literature. The Journal Impact Factor provides an important and objective measure of a journal’s contribution to scholarly communication. In the interest of fairness and accuracy for all journals, the distortion of the Journal Impact Factor by an excessive concentration of citations gives rise to the need for suppression. JCR staff will monitor these journals going forward and the titles will be included in a future edition of JCR when the anomalous patterns are resolved. Coverage of these journals in Web of Science and other Thomson Reuters products is not immediately affected by suppression from the JCR, however, the titles may be subject to review to determine if they continue to meet the quality and publication standards necessary for inclusion in Web of Science. More information on journal suppression is available at: http://wokinfo.com/media/pdf/jcr-suppression.pdf.
Self Citation Suppressed Titles with Key Data Points*
This table lists the categories for each journal (note that each journal may be included in multiple categories), the percentage of citations in the Journal Impact Factor numerator that are self cites, and the distortion in category rank due to self cites. The distortion in category rank is based on analysis of all journals in all categories of the JCR ranked both with and without the inclusion of self cites. Here distortion equals the percentage shift in rank with self cites included versus excluded.
Citation Stacking Suppressed Titles with Key Data Points*
This table lists the recipient and donor journal pairs along with the percentage of citations in the Journal Impact Factor numerator that are from the donor to the recipient (x% of the JIF Numerator cites to Recipient journal from Donor journal). The percentage exchange to the Journal Impact Factor years is the proportion of all citations from donor to recipient (all years) that reference the two years considered in the Journal Impact Factor calculation (x% of all citations from Donor to Recipient were concentrated in the Journal Impact Factor years).
* These key data points as well as other factors are considered in the suppression decision.
When citing Journal Citation Reports, be sure to include the following information:
· The JCR data year that you are referencing.
· The full name, Journal Citation Reports. Include the registered trademark symbol.
· The edition: Science Edition or Social Sciences Edition. (The edition is not essential.)
· Name of the publisher, Thomson Reuters.
· Copyright year. The copyright year appears at the bottom of every page in JCR.
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If you have questions about using our products or about your access to them, please visit our support page at http://science.thomsonreuters.com/support/. This page has links to our support Knowledgebase, the local telephone numbers and hours of operation. When you click on Open a Support Case, your issue will be immediately routed to your local support team.
Please go to http://science.thomsonreuters.com/techsupport/datachange/ to request changes to the database.
This file was last updated on 10/20/2014
Thomson Reuters and its product names and acronyms used herein are trademarks, registered trademarks, and service marks used under license. Thomson Reuters has no proprietary interest in the marks or names of others. Eigenfactor® Metrics, Eigenfactor® Score, Article Influence® Score are Licensed Marks used with permission from the University of Washington.
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