VALIDATION AND REFINEMENT WERE MADE OF A NONVERBAL GROUP MEASURE (KD PRONENESS SCALE) OF DELINQUENCY PRONENESS WHICH CAN BE USED WITH ALL CHILDREN INCLUDING NONREADERS, SLOW LEARNERS, AND THE MENTALLY RETARDED. BEFORE-AND-AFTER DATA WERE GATHERED ON A JUNIOR HIGH SCHOOL POPULATION, GRADES SEVEN TO NINE (N 2000) IN ONE CITY PUBLIC SCHOOL SYSTEM AND A SPECIAL CLASS SAMPLE FROM TWO COMMUNITIES (N 200). SUBJECTS WERE SHOWN 62 SETS OF PICTURES, AND ASKED TO INDICATE WHICH PICTURES THEY LIKED MOST AND LEAST. ALSO, BEHAVIORAL ADJUSTMENT DATA WERE GATHERED OVER A 30-MONTH PERIOD BY FIELDWORKERS. THE RELATIONSHIPS BETWEEN THE PREDICTION MEASURE OF PICTURES AND THE ADJUSTMENT CRITERIA WERE INVESTIGATED. THE NONVERBAL SCALE WAS KEYED ON THE BASIS OF AN ITEM ANALYSIS OF THE RESPONSES OF NONDELINQUENTS IN PUBLIC SCHOOLS COMPARED WITH INSTITUTIONALIZED DELINQUENTS IN SEVERAL STATE INSTITUTIONS. IN ADDITION, RELATIONSHIPS BETWEEN THE KD VERBAL SCALE, KD CHECK LIST, AND THE NONVERBAL SCALE WERE INVESTIGATED. THE REVISED NONVERBAL SCALE FAILED TO PASS THE RIGOROUS TESTS OF VALIDATION SET UP FOR EACH GRADE AND FOR THE VARIOUS GROUPS IN THE FORECASTING OF NORM-VIOLATING BEHAVIOR. IT WAS CONCLUDED THAT THE SCALE WAS NOT ACCEPTABLE AS A FUNCTIONALLY USEFUL INSTRUMENT THAT COULD BE INCORPORATED EASILY OR READILY IN A SCHOOL-COMMUNITY DELINQUENCY PREVENTION PROGRAM. (JL)