The bibliometric properties of article readership information: Research Articles
Journal of the American Society for Information Science and Technology
Worldwide use and impact of the NASA Astrophysics Data System digital library: Research Articles
Journal of the American Society for Information Science and Technology
Journal of the American Society for Information Science and Technology
Toward alternative metrics of journal impact: a comparison of download and citation data
Information Processing and Management: an International Journal - Special issue: Infometrics
Information Processing and Management: an International Journal - Special issue: Infometrics
Earlier Web usage statistics as predictors of later citation impact: Research Articles
Journal of the American Society for Information Science and Technology
An architecture for the aggregation and analysis of scholarly usage data
Proceedings of the 6th ACM/IEEE-CS joint conference on Digital libraries
Journal of the American Society for Information Science and Technology
Understanding journal usage: A statistical analysis of citation and use
Journal of the American Society for Information Science and Technology
Towards usage-based impact metrics: first results from the mesur project.
Proceedings of the 8th ACM/IEEE-CS joint conference on Digital libraries
Using Bibliographic Knowledge for Ranking in Scientific Publication Databases
Proceedings of the 2008 conference on Knowledge-Based Software Engineering: Proceedings of the Eighth Joint Conference on Knowledge-Based Software Engineering
Annual Review of Information Science and Technology
Effects of academic experience and prestige on researchers' citing behavior
Journal of the American Society for Information Science and Technology
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There exist ample demonstrations that indicators of scholarly impact analogous to the citation-based ISI Impact Factor can be derived from usage data; however, so far, usage can practically be recorded only at the level of distinct information services. This leads to community-specific assessments of scholarly impact that are difficult to generalize to the global scholarly community. In contrast, the ISI Impact Factor is based on citation data and thereby represents the global community of scholarly authors. The objective of this study is to examine the effects of community characteristics on assessments of scholarly impact from usage. We define a journal Usage Impact Factor that mimics the definition of the Thomson Scientific ISI Impact Factor. Usage Impact Factor rankings are calculated on the basis of a large-scale usage dataset recorded by the linking servers of the California State University system from 2003 to 2005. The resulting journal rankings are then compared to the Thomson Scientific ISI Impact Factor that is used as a reference indicator of general impact. Our results indicate that the particular scientific and demographic characteristics of a discipline have a strong effect on resulting usage-based assessments of scholarly impact. In particular, we observed that as the number of graduate students and faculty increases in a particular discipline, Usage Impact Factor rankings will converge more strongly with the ISI Impact Factor. © 2008 Wiley Periodicals, Inc.