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The Personality Assessment Inventory as a Proxy for the Psychopathy Checklist–Revised

Testing the Incremental Validity and Cross-Sample Robustness of the Antisocial Features Scale

Simon Fraser University, douglask{at}sfu.ca

Laura S. Guy

Simon Fraser University

John F. Edens

Southern Methodist University

Douglas P. Boer

University of Waikato

Jennine Hamilton

Correctional Service of Canada

The Personality Assessment Inventory's (PAI's) ability to predict psychopathic personality features, as assessed by the Psychopathy Checklist–Revised (PCL-R), was examined. To investigate whether the PAI Antisocial Features (ANT) Scale and subscales possessed incremental validity beyond other theoretically relevant PAI scales, optimized regression equations were derived in a sample of 281 Canadian federal offenders. ANT, or ANT–Antisocial Behavior (ANT-A), demonstrated unique variance in regression analyses predicting PCL-R total and Factor 2 (Lifestyle Impulsivity and Social Deviance) scores, but only the Dominance (DOM) Scale was retained in models predicting Factor 1 (Interpersonal and Affective Deficits). Attempts to cross-validate the regression equations derived from the first sample on a sample of 85 U.S. sex offenders resulted in considerable validity shrinkage, with the ANT Scale in isolation performing comparably to or better than the statistical models for PCL-R total and Factor 2 scores. Results offer limited evidence of convergent validity between the PAI and the PCL-R.

Key Words: psychopathy • Personality Assessment Inventory • PAI • Psychopathy Checklist— Revised • PCL-R • personality assessment • forensic assessment • offenders • antisocial personality disorder

Assessment, Vol. 14, No. 3, 255-269 (2007)
DOI: 10.1177/1073191107302138


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