Via an overview of core journal studies, emphasizing the social sciences and education, this review looks for best practices in both motivation and methodology. Selection decisions receive particular focus. Lack of correlation between methods is indicative of the complexity of the topic and the need for judgment in design and use. (Author)

Librarians rely on the Institute for Scientific Information's journal impact factor as a tool for selecting periodicals, primarily in scientific disciplines. A current trend is to use this data as a means for evaluating the performance of departments, institutions, and even researchers in academic institutions--a process that is now being tied to…