Adolescents' movements toward individuation are believed to be supported by secure attachments to parents. Previous research has found that individuation could be operationalized with indices of connectedness and separateness, but the relationship between these variables has not been fully explored. The present study demonstrated that attachment and differentiation variables were positively related using different and multiple operationalization procedures. Furthermore, a more comprehensive model of adolescent ego development was proposed which included parental control, individuation, and ego identity constructs. Results suggest parental control restricts successful individuation, but that adjustment on individuation indices predicts advanced identity development.