This unique new book provides welcome guidance for researchers studyin g the complexities of group process. The editors begin by introducing nine approaches currently in use for studying group process. Contrib utors apply each of the nine approaches to analyze the same clinical v ignette. These chapters enable readers to understand the method of ea ch measurement system, the theory on which the system is based, and wh at has been learned about group psychotherapy processes through the ap plication of each measurement system. This thorough examination provi des a rich source for theory building and research design in analyzing change in groups, as well as an innovative resource for students, tea chers, clinicians, and researchers.