Abstract
Psychopathy is an important forensic mental health construct. Despite this importance, the research base of psychopathy among individuals convicted of capital murder is limited. Archival data were collected from a sample of 636 persons convicted of capital murder and sentenced to death in the State of California. Psychopathy was assessed using the Psychopathy Checklist - Revised (PCL-R) instrument. Data on criminal careers and other behavioral disorders were also extracted. The sample mean PCL-R total score was 23.31 (SD=9.92) and one-third of individuals in this sample were considered clinically psychopathic with PCL-R total scores of 30 or greater. Factor analytic examination yielded support for four facets: affective, interpersonal, lifestyle, and antisocial. Criterion validity findings revealed positive correlations of psychopathy scores with Antisocial Personality Disorder (ρ=0.72), Conduct Disorder (ρ=0.46), sexual sadism (ρ=0.24), Oppositional Defiant Disorder (ρ=0.20), ADHD (ρ=0.15), arrest charges (r=0.56), prison sentences (r=0.53), and age of arrest onset (r=-0.57). Individuals convicted of capital murder and sentenced to death reflect heterogeneity in psychopathy with some individuals exhibiting pronounced psychopathic features.
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