A Kantian model of moral development already tested on adolescents was further tested on normal and delinquent Korean adults. The model, based on the philosophy of Kant, starts its causality from the self, moves from the self to parental images, advances from parental images to duty and legality, and moves from duty and legality to a moral universality. The self is considered the basis for moral ideas. Parental images can intervene between the self and morality, and the ultimate morality becomes treating human beings as ends. Subjects were 158 (75 male and 83 female) college students and 197 (95 male and 102 female) prisoners. Scales for the constructs of self, parental images, duty, legality, and moral universality were developed, and their reliabilities with these populations were determined. Results supported the Kantian model of morality, although the structure of morality in the criminals seemed to consist of two distinctive poles, that of self-parental image and that of duty-universal morality. The linear relationship of causal processes in the morality of normal subjects was not found for the criminals. Appendixes A through C give diagrams for group variables, appendix D contains path coefficients for delinquents, and appendix E lists statistical differences between the groups. (Contains 16 references.) (SLD)