A prototype computer-assisted teaching training system (CATTS) was developed to help train special education personnel. CATTS is a comprehensive system which produces systematic observation, real-time analysis, storage, and feedback of specific observation coding data relevant to special education classroom teacher-pupil interactions. An investigation demonstrated the relative effectiveness of CATTS instantaneous (visual) and delayed (printout) feedback in increasing various cognitive and management behaviors of preservice teacher-trainees in a controlled classroom setting. It was found that CATTS is a versatile and comprehensive delivery system which can be applied in many ways to analyze real-time process variables within behavior training fields. Two statistical tables and three graphs include a schematic diagram of the arrangement of a CATTS station. (Author/JY)