The Representation of Four Personality Disorders by the Schedule for Nonadaptive and Adaptive Personality Dimensional Model of Personality.

Abstract

This study examined the relationships of the Schedule for Nonadaptive and Adaptive Personality (SNAP) model of personality to 4 targeted personality disorders (PDs) in a large multisite sample of patients. Data were examined from 529 patients, who were assigned 1 of 5 primary diagnoses: borderline, schizotypal, avoidant, and obsessive-compulsive PDs and major depression without PD. Patients were administered the SNAP questionnaire and results were compared among diagnostic groups and between patient groups and nonclinical norms. Results indicated that the dimensions of the model appear to have considerable promise in differentiating normal from abnormal personality, particularly in the propensity of individuals with PDs to manifest negative affects and interpersonal detachment. Furthermore, the model appeared to successfully distinguish specific PDs, a property that represents a particular challenge for dimensional models of personality.

Personality Assessment in DSM-5: Empirical Support for Rating Severity, Style, and Traits

“…Internal consistency in our study sample was consistent with results described in the SNAP manual (Clark, 1993): medians of .89 for the higher order scales and .84 for the lower order scales (Morey et al, 2003).…”

Comparison of alternative models for personality disorders

“…The demonstration that the FFM and SNAP share content with a third model is a matter of convergent rather than predictive validity insofar as the DSM, FFM and SNAP represent three distinct efforts to conceptualize individuals characterized by similar features. In previous reports (Morey et al 2002(Morey et al , 2003 we have noted convergences between these different approaches to personality description. However, common among theoretical systems of diagnostic acceptability (Robins & Guze, 1970 ;Kendell, 1975 ;Blashfield & Draguns, 1976) is the notion that predictive validity is more directly pertinent to the selection of diagnostic models than convergent validity, or, as Kendell (1975) noted, 'all diagnostic concepts stand or fall by the strength of the prognostic and therapeutic implications they embody ' (p. 40).…”

Migration Load, Ecological Opportunity, and Obsessive Compulsive Personality Disorder Etiology: Obsessive Character as an Adaptation to Seasonality

“…Compulsive Conscientiousness Conscientiousness, diagnostically represented by DSM-V criterion 3 (is excessively devoted to work and productivity), was present from Freud's initial description (Freud 1908(Freud / 1959Gay 1989) and is increasingly emphasized by contemporary trait investigations (Samuel and Widiger 2010;Widiger et al 2002;Morey et al 2003;Deary et al 1998). …”