Journal Citation Reports (JCR) provides an analytical method for determining the quality of a particular scholarly journal compared to other journals in its field. JCR uses a ratio know as the impact factor to identify a journal's standing. For instance:
The 2010 impact factor of a journal would be calculated as follows:
- A = the number of times articles published in 2008 and 2009 were cited by indexed journals during 2010
- B = the total number of "citable items" published by that journal in 2008 and 2009.
- 2010 impact factor = A/B
- The h index
- Expresses the journal's number of articles (h) that have received at least h citations. It quantifies both journal scientific productivity and scientific impact and it is also applicable to scientists, countries, etc.
- Author’s total article count = 33
- 18 of the articles are cited at least 18 times
- h-index = 18