This report summarizes a study which gathered data on 80 presearch interviews in seven medical libraries in order (1) to identify the verbal and nonverbal behaviors that facilitate, maintain, or impede information exchange in interviews between search intermediaries and library users requesting computer-based literature searches; (2) to identify tasks librarians perform to facilitate information exchange; and (3) to objectively code videotaped presearch interviews in terms of the extent to which those tasks were accomplished. Chapters describe research aims, research design, data analysis, and research findings. The bibliography lists 110 sources. Appendices contain the major data-gathering instruments and coding/analysis forms employed in the project, as well as a sample interview. (FM)