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The 2-Year Test-Retest Reliability of the Psychopathy Checklist-Revised in Methadone Patients

Megan Rutherford

Alcohol and Drug Abuse Institute, University of Washington, University of Pennsylvania School of Medicine

John S. Cacciola

Arthur I. Alterman

James R. McKay

Terry G. Cook

University of Pennsylvania School of Medicine

The 2-year test-retest reliability of the Psychopathy Checklist-Revised (PCL-R) was examined in 200 men and 25 women methadone patients. Stability of the PCL-R was generally good whether it was evaluated as a dichotomous or dimensional measure. Utilizing a diagnostic cutoff score of 25 or more the intraclass correlation coefficients (ICCs) were .48 for men and .67 for women. For the Total PCL-R score ICCs were .60 and .65 for men and women, respectively. Factor 1 was more reliably measured in women compared to men (.63 vs. .43). For men, Factor 1 was significantly less reliable than Factor 2 or the Total score. For women, Factor 2 was significantly less reliable than the Total PCL-R score or Factor 1.

Key Words: PCL-R • reliability • methadone • male • female

Assessment, Vol. 6, No. 3, 285-291 (1999)
DOI: 10.1177/107319119900600308


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