No abstract

Although psychopathy is frequently regarded as qualitatively distinct from other conditions, relatively little research has examined whether psychopaths represent a distinct class of individuals. Using a sample of 876 prison inmates and court-ordered substance abuse patients who were administered the Psychopathy Checklist-Revised (R. D. Hare, 2003), the authors examined the latent structure of psychopathy using several taxometric procedures developed by Meehl and colleagues (P. E. Meehl & L. J. Yonce, 1994; N. G. Waller & P. E. Meehl, 1998). The results across these procedures offer no compelling support for the contention that psychopathy is a taxonic construct and contradict previous reports that psychopathy is underpinned by a latent taxon. The authors discuss the theoretical, public policy, and practice-level implications of these findings.

Two measures of psychopathic features in youths, the self-report version of the Antisocial Process Screening Device (APSD) and the Youth Psychopathic traits Inventory (YPI) were administered to 165 youths in a juvenile diversion program. For both measures, internal consistency was poor for the scales that assess the affective domain of psychopathic features; otherwise, internal consistency was excellent for the YPI and generally superior to that of the APSD. However, the published three-factor models for both measures did not replicate when examined using confirmatory factor analysis. Both measures obtained the expected correlations with measures of a variety of criminal justice (e.g., age of delinquency onset, past year delinquent behavior) and psychological constructs (e.g., internalizing and externalizing behavior), providing evidence of construct validity for both measures. The YPI appears to be the better measure for exploring the construct of psychopathy in adolescents. Recommendations are made concerning revisions to the APSD.

Much of the research on psychopathy has treated it as a unitary construct operationalized by total scores on one (or more) measures. More recent studies on the Psychopathic Personality Inventory (PPI) suggest the existence of two distinct facets of psychopathy with unique external correlates. Here, the authors report reanalyses of two offender data sets that included scores on the PPI along with various theoretically relevant criterion variables. Consistent with hypotheses, the two PPI factors showed convergent and discriminant relations with criterion measures, many of which would otherwise have been obscured when relying on PPI total scores. These results highlight the importance of examining facets of psychopathy as well as total scores. Keywords psychopathy; two-factor model; antisocial behavior; externalizing; personality Over the past three decades a wealth of research has been conducted on psychopathic personality, typically operationalized using the Psychopathy Checklist-Revised (PCL-R; Hare, 2003). Although the PCL-R remains the best-validated measure of psychopathy, in recent years a number of other measures have emerged to assess psychopathic traits, primarily via selfreport. The Psychopathic Personality Inventory (PPI; Lilienfeld & Andrews, 1996) is one newer self-report measure that is heavily grounded in the work of Cleckley (1941) and other early theorists. The PPI focuses on personality traits, attitudes, and dispositions but, unlike the PCL-R, does not assess explicitly antisocial behavior. Additionally, as a self-report scale, the PPI potentially offers several practical advantages over a more labor-intensive measure based on individual clinical interviews and reviews of extensive file data.Correspondence concerning this article should be addressed to Christopher J. Patrick, Department of Psychology, University of Minnesota, Elliott Hall, 75 East River Road, Minneapolis, MN 55455. E-mail: cpatrick@tc.umn.edu. Further information concerning the details of analyses reported here (including the initial factor analysis of PPI subscales and derivation of PPI factor scores employed in the main analyses) can be obtained from the corresponding author upon request.

The Triarchic model of psychopathy describes this complex condition in terms of distinct phenotypic components of boldness, meanness, and disinhibition. Brief self-report scales designed specifically to index these psychopathy facets have thus far demonstrated promising construct validity. The present study sought to develop and validate scales for assessing facets of the Triarchic model using items from a well-validated existing measure of psychopathy—the Psychopathic Personality Inventory (PPI). A consensus rating approach was used to identify PPI items relevant to each Triarchic facet, and the convergent and discriminant validity of the resulting PPI-based Triarchic scales were evaluated in relation to multiple criterion variables (i.e., other psychopathy inventories, antisocial personality disorder features, personality traits, psychosocial functioning) in offender and non-offender samples. The PPI-based Triarchic scales showed good internal consistency and related to criterion variables in ways consistent with predictions based on the Triarchic model. Findings are discussed in terms of implications for conceptualization and assessment of psychopathy.