Journal Citation Reports (JCR) is a resource tool published annually by Thomson Reuters (formerly ISI) to provide citation and publication data of academic journals in the science and social science fields.
For each year, there are two editions:
Social Sciences Edition - Over 3,100 journals in 56 subject categories
JCR covers journals indexed in the "Science Citation Index Expanded" (SCI) and the "Social Sciences Citation Index" (SSCI), the 2 journal citation indexes in "Web of Science" (WoS). However, JCR does not provide citation figures for journals indexed in the "Arts and Humanities Citation Index" (A&HCI).
Access InCites Journal Citation Report via this link:
Note that JCR is also accessible as part of Web of Science - select "Journal Citation Reports" from the tool bar at the top of the screen after accessing Web of Science:
Refer to these online tutorials to learn how to use JCR in the new InCites platform.
Identify top journals in a subject category -
Identify top journals in selected subject categories (more than one category) -
Impact Factor (IF) is the average number of times articles from the journal published in the past two years have been cited in the reference year.
For example, the IF for 2014 for Industrial and corporate change is 1.26:
Cites in 2014 to items published in 2012 and 2013 /
number of items published in 2012 and 2013
= 126 / 100 = 1.26
Other JCR metrics:
Click a journal name in JCR to view detailed citation data of the journal.
Refer to the quick links on this page in the "JCR tutorials & guide" box on the right to access the search guides and tutorial and learn more about these metrics.
Refer to the "Quartile Score" box on this page to learn more about Quartile Score.
Refer to the "Eigenfactor.org" box on the "Other Journal Ranking Tools" page to learn more about Eigenfactor metrics.
The value of an Impact Factor itself does not show you the relative importance of a journal. Instead, you have to compare the Impact Factors of journals in the same field to identify a journal's impact.
The Quartile in Category or the Quartile Score, on the other hand, shows the relative location of a journal along the range of an Impact Factor distribution.
To view the Quartile Score of a journal, from a journal record, click on the "Rank" option underneath the "Key indicators" table. Then you will see a table showing the ranking of this journal in its subject catagories based on Impact Factor.
The journal "Fuel Cells", for example, ranks 9th out of 72 in the "Chemistry, Applied" category in 2014. It falls into the highest quartile (Q1) in this category and is among the top 25% of the IF distribution. In the "Energy & Fuels" category, this journal ranks 24th out of 89 journals in 2014, a mid-high position, Q2, which denotes between top 50% and top 25% of the IF distribution.
Q3 denotes a middle-low position (top 75% to top 50%), and Q4 bottom position (bottom 25% of the IF distribution).
JCR Impact Factor has a long history of over 30 years and is still the most popularly used journal measure. However, it has its limitations:
You should therefore realize these limitations and use IF with caution.