Research designed to compare student satisfaction between a traditional-lecture psychology course and a personalized system of instruction (PSI) course is described. Students compared two identical courses in personality taught by the same instructor. Students were generally more satisfied with the PSI course. The results are that they found the assignments more mutually reinforcing, and felt that the PSI course introduced more new ideas, concepts, and methods; rated their satisfaction with the instructor higher in the PSI course because they believed that he showed more enthusiasm and placed the course within a larger context than the traditional lecture course; and rated their own performance higher and believed that they prepared more for the class sessions and participated more in class discussion. (Author/DE)