Article level metrics: a look beyond the journal impact factor

The journal Impact Factor and alternative metrics

J ournal impact factors (JIFs) have become a widely used tool to judge the quality of scientific journals and single publications. JIFs are calculated by the scientific division of Thomson Reuters and published annually in the Journal Citation Reports (JCR). At first, the JCR’s origin was guided by the needs of librarians who wanted to use a quantitative method to select journals for their hold...

Google Scholar journal metrics: Comparison with impact factor and SCImago journal rank indicator for nuclear medicine journals

Introduction: In the current study, we compared h5-index provided by Google Scholar (GS), impact factor (IF) provided by web of sciences (WOS), and SCImago journal rank indicator (SJR) provided by SCOPUS for quality assessment of nuclear medicine journals. Methods: 2013 h5-index, 2012 IF, and 2011 SJR of nuclear medicine journals were extracted from their publishers namely GS, WOS, and SCOPUS....

Article-Level Metrics and the Evolution of Scientific Impact

Formally published papers that have been through a traditional prepublication peer review process remain the most important means of communicating science today. Researchers depend on them to learn about the latest advances in their fields and to report their own findings. The intentions of traditional peer review are certainly noble: to ensure methodological integrity and to comment on potenti...

Assessing the value of a journal beyond the impact factor

The well-documented limitations of journal impact factor rankings and perceptual ratings, the evolving scholarly communication system, the open access movement, and increasing globalization are some reasons that prompted an examination of journal value rather than just impact. Using a single specialized journal established in 1960, about education for the Information professions, this paper dis...

Impact Factor , Eigenfactor , Journal Influence and Article Influence