Using Quay's typology, three equal groups (n=12) of adolescent psychopathic, neurotic, and subcultural delinquent males and a matched nondelinquent control group were individually administered Kohlberg's structured moral dilemmas, two Piagetian tasks of cognitive development (pendulum and balance), and an adaptation of Flavell's role-taking task. Findings provide further evidence against viewing delinquency as a unitary syndrome of deviance. (Editor/RK)