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Journal Citation Reports - The Impact Factor and Other Metrics: Eigenfactor & Article Influence

A brief introduction to using JCR for locating and interpreting the impact factor for journals. Included is the Eigenfactor metrics and other aggregate impact factors.

Eigenfactorâ„¢ Score and Article Influenceâ„¢ Score

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.

For more information on Eigenfactor™ Metrics, click here.

Here's the Eigenfactor Score and Article Influence Score displayed in Journal Citation Reports for the subject category Pharmacology & Pharmacy. Notice the Article Influence Score is highlighted.


Here is a closer look at the journal Nature Reviews Drug Discovery reported from

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