The Eigenfactor Score measures the number of timesthat articles from a journal have been cited in the JCR year. The Eigenfactor Project also provides an Article Influence Score that measures the importance of the journal on a per-article basis.
"Eigenfactor.org® is an academic research project co-founded by Jevin West and Carl Bergstrom and sponsored by the Bergstrom Lab in the Department of Biology at the University of Washington. We aim to use recent advances in network analysis and information theory to develop novel methods for evaluating the influence of scholarly periodicals and for mapping the structure of academic research. We are committed to broadly disseminating our research findings and technological developments, while respecting the confidentiality of the data sources we use. Several aspects of the Eigenfactor Project can be found at Eigenfactor.org (beta version)."