The authors tested
J.
S. Wulach's suggestion that the criminal personality is a quadruple personality disorder (PD) consisting of antisocial, borderline, histrionic, and narcissistic PDs. First, forensic patients with antisocial PD were compared to patients without PD using the Millon Clinical Multiaxial Inventory-II (MCMI-II). Second, mean MCMI-II PD scale scores of the antisocial group were examined for clinical significance. Lastly, correlations between the Antisocial scale and all other PD scales of the MCMI-II were computed to examine patterns of association. All comparisons support Wulach `s thesis that borderline and narcissistic pathologies coexist in antisocial individuals but provide only weak support regarding the role of histrionic pathology in antisocial individuals.