The FFM conceptualization of the DSM personality disorders suggests that some of them might be differentiated with respect to specific facets of the same domain. For example, it was predicted that the schizotypal and avoidant personality disorders would both correlate negatively with extraversion, but that only the avoidant would correlate negatively with assertiveness and excitement-seeking and only the schizotypal would correlate negatively with warmth and positive emotions. These specific facet hypotheses of extraversion were confirmed for schizotypal PD but not for avoidant.
