This codebook clarifies the variables used in a study analyzing the verbal behaviors of search intermediaries and library users requesting online bibliographic searches. Gathering data on 80 presearch interviews in seven medical libraries, the study was conducted (1) to identify verbal and nonverbal behaviors that facilitate, maintain, or impede information exchange; (2) to identify tasks that are accomplished by the librarian to facilitate information exchange; and (3) to objectively code videotaped presearch interviews in terms of the extent to which those tasks were accomplished. Chapters detail the method for transcribing interviews, describe coding procedures and forms, list the variables, define each variable, and provide examples of coding. (FM)