Overall, there was limited discrimination between specific PDs and the externalizing-internalizing structure. Schizotypal and avoidant PDs had distinct associations with factor 2 (fear) and, in concert with borderline PD, provided a strong contrast between the two internalizing factors, while schizotypal, avoidant, and obsessive-compulsive PDs further defined boundaries between factor 2 (fear) and factor 1 (externalizing disorders). More typically, the majority of PDs evidenced significant associations with all three factors, a finding consistent with multiple factor associations reported in other recent studies (Eaton et al., 2011; Kotov et al., 2011).
