title: The Schedule for Nonadaptive and Adaptive Personality (SNAP): temporal stability and predictive validity of the diagnostic scales.
abstract: The authors investigated the test-retest reliability and predictive validity of the diagnostic scales from the Schedule for Nonadaptive and Adaptive Personality (SNAP). Participants were identified from a sample of 240 undergraduates who completed the SNAP and the Social Adjustment Scale (SAS-SR) at Time 1. The authors selected 50 people who met criteria for a personality disorder (PD) based on the SNAP and 50 who did not qualify for a diagnosis. Eighty-three of these people completed the SNAP and the SAS-SR for a second time approximately 9 months after initial screening. SNAP PD scales were relatively stable over time. Test-retest correlation coefficients ranged from .58 to .81. Scores on diagnostic scales for paranoid, schizoid, and schizotypal PD were inversely related to self-reported levels of adjustment for social roles concerned with work as a student, leisure activities, and relationships with family. The results provide some evidence for the validity of the SNAP
authors.affiliation: University of Virginia, Charlottesville 22904-4400, USA.
authors.forename: Alison H
authors.initials: AH
authors.lastname: Melley
authors.forename: Thomas F
authors.initials: TF
authors.lastname: Oltmanns
authors.forename: Eric
authors.initials: E
authors.lastname: Turkheimer
mesh_terms: D000223:Adaptation, Psychological / Q000145:classification*; D000328:Adult; D005163:Factor Analysis, Statistical; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D010554:Personality Disorders / Q000175:diagnosis*; D010556:Personality Tests; D011237:Predictive Value of Tests; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D012044:Regression Analysis; D015203:Reproducibility of Results; D013997:Time Factors