A QUANTITATIVE COMPARISON OF THE PSYCHOLOGICAL CHARACTERISTICS OF PEACE CORPS TRAINING UNITS AND TRAINEES WAS MADE TO PROVIDE A BASIS FOR RATING PROGRAM QUALITY, ESTABLISHING UNIFORM TRAINING OBJECTIVES AND PROCEDURES, ENABLING TRAINING INSTITUTIONS TO IDENTIFY AND IMPROVE AREAS OF WEAKNESS, AND SELECTING TRAINEES. AN ANALYSIS OF 63 PEACE CORPS TRAINING UNITS IN 48 HOST INSTITUTIONS MEASURED TRAINEES AND PROGRAMS USING TOOLS EVOLVED FROM STUDIES OF HIGHER EDUCATION BY STERN, STEIN, AND BLOOM. MEASUREMENTS OF SUCCESS WERE FINAL SELECTION BOARD RATINGS OF TRAINEES, TRAINING ATTRITION, AND OVERSEAS EFFECTIVENESS RATINGS. PROGRAM CHARACTERISTICS ASSOCIATED WITH EFFECTIVE PROGRAMS WERE FRIENDLY GROUP INTERACTION, WELL-ROUNDED INTELLECTUAL EXPERIENCE, EMPHASIS ON SOCIAL ACTION, INDIVIDUAL TRAINEE AUTONOMY AND RESPONSIBILITY, AND HIGH PERSONAL ACHIEVEMENT STANDARDS. A NUMBER OF PERSONAL CHARACTERISTICS HAD DIFFERENT EFFECTS ON SUCCESS IN VARIOUS PHASES OF EVALUATION. NINE APPENDIXES CONTAIN DETAILED MEASURES OF THE FACTORS STUDIED FOR EACH OF THE 63 PROGRAMS. (JA)