In order to examine the degree to which different assessment instruments moderated the relationships between the FFM facets and the DSM PDs, separate effect sizes were calculated for each instrument that was administered within at least three samples. At least three studies administered the NEO PI-R, the SIFFM, or the FFMRF. There were four DSM personality disorders instruments that were administered in at least three of the studies, including the Personality Diagnostic Questionnaire (PDQ-4; Hyler, 1994), the Schedule for Nonadaptive and Adaptive Personality (SNAP; Clark, 1993b), and the Millon Clinical Multiaxial Inventory third edition (MCMI-III; Millon et al., 1996). Additionally, the Structured Clinical Interview for DSM-IV Axis II (SCID-II; First, Gibbon, Spitzer, Williams, & Benjamin, 1997a) and its companion self-report instrument, the SCID-II Questionnaire (SCID-II-PQ) were collapsed for the purposes of these calculations.
