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Citation Research & Impact Metrics

Journal Citation Reports (JCR)

Journal Impact Factor (JIF)

The Journal Impact Factor (JIF) is defined as all citations to the journal in the current Journal Citation Reports (JCR) year to items published in the previous two years, divided by the total number of items published in the journal in the previous two years.

Calculation of Journal Impact Factor (JIF) in the Year 2019:

 JIF in 2019   No. of citations to all items published in 2017 and 2018
Total no. of items published in 2017 and 2018

Note:

  • JIF of 2.0 means that on average, the items published one or two years ago have been cited two times.
  • The citing works may be items published in the same journal or they may be from different journals, proceedings or books indexed in Web of Science Core Collection.
  • Not all journal have a JIF, they must be indexed in JCR, which covers journals listed in Science Citation Index Expanded (SCIE) and/or Social Sciences Citation Index (SSCI) of Web of Science.

5-Year Impact Factor

The 5-year Impact Factor is the average number of times items from a journal published in the last five years have been cited in the JCR year (as compared to the last 2 years for JIF).

Calculation of 5-Year Impact Factor in the Year 2019:

 5-Year IF in 2019   No. of citations to all items published in 2014-2018
Total no. of items published in 2014-2018

Note:

  • The 5-Year IF should not be thought of in terms of “multi-year” Impact Factor. While it does consider multiple cited years, the 5-Year IF uses data from just one citing year (the year of the edition).
  • A journal with only 2 or 3 years of publication will have a 5-Year IF equal to a 2-Year IF because the previous years of items counts are known to be zero. A journal that has additional years of publication but no additional years of coverage in Web of Science will have a 2-Year IF but no 5-Year IF since the additional data-elements required for the 5-Year IF calculation are not known. 

Find Journal Impact Factor (JIF) and Journal Ranking in JCR

Step 1: Connect to JCR.

 

Step 2: Enter the journal title and click on the matching journal in the dropdown menu.

 

Step 3: You will be brought to the Journal Profile page, where you can view the Journal Impact Factor (JIF), 5-Year IF and other key indicators. Scroll down the Journal Profile page to view additional information, such as rank with subject category and quartile.

Note:

  • The quartile is given as Q1, Q2, Q3 and Q4 where Q1 indicates that the journal is in the top 25% of its subject category (Tier 1).

Detailed Instructions on how to find the Journal Ranking (based on 5-Year IF) in JCR

CiteScore

CiteScore is a set of journal metrics generated using citation data from Scopus. The calculation of CiteScore for the current year is based on the number of citations to documents (articles, reviews, conference papers, book chapters, and data papers) by a journal over four years, divided by the number of the same document types indexed in Scopus and published in those same four years.

Calculation of CiteScore in the Year 2019:

 CiteScore in 2019   No. of citations to all items published in 2016-2019
Total no. of items published in 2016-2019

 

Find CiteScore and Journal Ranking in Scopus

Step 1: Connect to Scopus Sources.

 

Step 2: Select "Title" from the dropdown menu, enter the journal title and click Find sources.

 

Step 3: Click on the matching journal. 

 

Step 4: You will brought to the Journal Profile page, where you can view the CiteScore and how it is calculated, the ranking of this journal in relevant subject categories.

A CiteScore percentile of 92% means that the journal is in the top 8% of its subject field equating to Q1 (Tier 1).

Note:

  • The CiteScore percentile indicates the relative standing of a journal in its subject field. The quartiles are as follows:

Q1: 99th-75th CiteScore percentile

Q2: 74th-50th CiteScore percentile

Q3: 49th-25th CiteScore percentile

Q4: 24th-0 CiteScore percentile

Detailed Instructions on how to find the Journal Ranking in Scopus