Differentiating Ego Functions of Borderline and Narcissistic Personalities

This study investigated differences in ego functions of borderline and narcissistic personality disorders through examining responses to Rorschach structural and content variables. Reality testing, thought process, affective regulation, impulse control, and the defenses of splitting and grandiosity were examined from Rorschach protocols of 50 borderlines and 26 narcissists. The borderlines produced greater distortion in reality testing, p < .05; the narcissists produced more insidious thought process disturbance, p < .05; and higher functioning groups demonstrated greater control of impulses, p < .05. Borderlines in this sample demonstrated more affective constriction than the narcissists and used more splitting, p < .05; narcissists used more grandiosity, p < .05. Implications of this study are (a) ego functions mature inconsistently, (b) affective responsivity influences ego disorganization, and (c) level of functioning and IQ are related to the production of Rorschach variables.