An online library catalog was used to evaluate an interactive query expansion facility based on relevance feedback for the Okapi, probabilistic, term weighting, retrieval system. A graphical user interface allowed searchers to select candidate terms extracted from relevant retrieved items to reformulate queries. Results suggested that the…

Presents a stratified model of information retrieval interaction that views interaction as a dialog between participants (user and computer) through an interface. Discusses traditional and interaction models, and extension to relevance, user modeling, search term selection, and types of feedback in information retrieval. (AEF)

Examines how metacognitive theory can be integrated into the design of computer-based learning environments through the user interface. Highlights include interface design, metacognition and cognitive processes, using metaphors, user access to information, visual feedback, navigational tools, interaction styles, menus, and self-evaluation methods.…