within agreeableness). It would be of interest for future research to compare the NEO PI-R and HEXACO-PI with respect to FFM PD relationships. For instance, schizotypal PD measures might correlate with the HEXACO-PI openness facet of unconventionality (contrary to the NEO PI-R, but consistent with the SIFFM). Additionally, one might expect a correlation of most OCPD measures (beyond simply the MCMI-III and SNAP) with the HEXACO-PI's conscientiousness facet of perfectionism. However, comparable findings to the NEO PI-R are likely to be obtained for dependency. The HEXACO-PI actually includes a facet scale of dependency (i.e., explicitly including this PD construct as a maladaptive variant of a universal personality structure) but it is provided as a facet of emotional instability rather than agreeableness (or honest-humility).
