The use of student proctors or tutors for a Personalized System of Instruction (PSI) has been considered essential; however, the cost of tutorial training programs may be prohibitive. In an attempt to develop an equivalent but less expensive alternative, students (N=219) participated in an evaluation of the use of a VAX computer system as a proctor/tutor in a PSI section of introductory psychology. Half of the students received tutoring from experienced human tutors and the remaining half via an interactive video display from the VAX system. All feedback was limited to the concept and its location within the course's written material which the tutor identified as not having been mastered by the student. Performance on a final exam demonstrated the superiority of PSI over traditional methods but failed to differentiate between tutorial methods. Analysis of detailed questionnaires which covered students' study habits, course organization abilities, and course format preferences revealed that students preferred the PSI method and tutorial method which they experienced compared to other methods available. Further, the questionnaire identified a profile of those students who gravitated toward either the human or computer tutors. Overall, the computer proved to be acceptable as an effective tutor for most of the student population. The format evaluation questionnaire and the pattern of responses are appended. (Author/WAS)