Research Indicators Rob van der Bliek Mark Robertson

Sources of Citation Data ISI Products Web of Science (ISI) Journal Citation Reports (ISI) Other Products Google Scholar Google Books Publish or Perish (Herzing) Scopus

3 Kinds of Citation Data Articles • Citation Impact Authors • h-index & g-index Journals • Journal Impact Factor

Kinds of Citation Data Counting Articles Times Cited

Kinds of Citation Data Author Impact • Average number of citations/article • h-index: a scholar with an index of h has published h papers with at least h citations each

Kinds of Citation Data Journal Quality Impact Factor: The average number of times published papers are cited in the two calendar years following publication

The problem of research indicators • • • Disciplinary publication patterns Time lag in publication cycle Greater science coverage in ISI Bias towards citation in journals in ISI Geographic and linguistic bias Matthew effect

Psychiatry journals

Developmental Psychology journals

Example problem Challenges • No ISI data • No journal impact factor available • Only Google Scholar data available

Solutions? • Google Scholar • Helps address limited coverage of ISI • Helps track impact wider economic or social impact beyond academic publications • H-index and G-index help correct differences in publication cycle time lag that may be characteristic of different disciplines • Download usage data • Helps track impact beyond scholarly citation • Helps track local as opposed to global impact