My coauthor and I illustrated developmental arrest as a conceptual category by means of a case culled from the analytic literature, reported in a series of papers by Zavitzianos (1967, 1971, 1977), who regarded the patient as a "juvenile delinquent." As he described this young woman, she was overtly infantilej only her intellectual func tions seem to have escaped the arrest of her development within the phallic phase-phase III of the hierarchical model we proposed in Models of the Mind (see Gedo and Goldberg, 1973, fig. 15, p . 146). By means of a successful analysis, the patient's development was resumed. As she put it herself, she ventured into places where she had never been before: she began to experience guilt, accepted a set of ideals, accom modated her behavior to the reality principle, and repression replaced disavowal as her characteristic mode of defense (see Gedo and Gold berg, 1973, fig. 14, p. 145).