The 160-item instrument was drawn from personality theories and from clinical practice related to delinquency. The objectives were to test a set of items for their power to discriminate delinquent from nondelinquent responses and to validate the power of these items to discriminate delinquent from nondelinquent youths in a second mixed group. Significantly discriminating items emerged which, when administered to a second group, correctly classified 80 percent of the tested youth. Subjects were 125 youths selected as delinquents and 125 nondelinquents. Selected items referred to family togetherness and supportiveness, limit-setting and behavior consequences, self-esteem and success, and school functioning. The test items can be used to educate parents, other adults, and students in recognizing some psychosocial behaviors related to interpersonal social behavior. Data tables and illustrations, about 100 references, and the appended inventory items and supplementary material are included. (Author abstract modified)