The initial pool of potential studies was drawn from those included in the reviews by Saulsman and Page (2004), O'Connor (2005), and Mullins-Sweatt and Widiger (2006). However, it is worth noting that only one of the studies included within Saulsman and Page was included in the current meta-analysis (i.e., Dyce & O'Connor, 1998) as this was the only study at that time to include a facet level assessment of the FFM. Beyond these initial sources, electronic literature searches were also conducted using the Psycinfo database for all studies published before October of 2006. In order to ensure an exhaustive search for relevant studies, the keywords DSM, personality disorder, PD, MCMI, MMPI, SCID, PDQ, SNAP, CATI, WISPI, SCID-II, PDI-IV, and SIDP were entered individually to identify studies that had administered personality disorder measures. These results were then cross-searched with the keyword terms FFM, big five, five factor, five-factor model, NEO, NEO PI-R, and SIFFM to ensure that a measure of the FFM had also been included. Studies identified by these search terms were then examined individually to determine their relevance.
