Presents brief history of process research leading to development of process model, which guided development of four measures: therapist intentions, therapist response modes, client reactions, and client behaviors. For each measure, presents description and information about format for data collection, validity, reliability, and research findings.…

Research relating to the factor structure of the Sixteen Personality Factor Questionnaire (16PF) and the Clinical Analysis Questionnaire is reviewed. Different opinions about the factors measured by the 16PF are discussed. Focusing on the second-order factor level could eliminate problems with the instruments' reliability. (SLD)