Kathy Lewis

TL;DR: The present results suggest that risk-related treatment changes demonstrated by high- risk psychopathic offenders can be predictive of reductions in violent recidivism, and that reliable measurements of therapeutic change may be informative about treatment outcome in a high-risk violent offender group.

TL;DR: The results suggest that, in a high-risk group of offenders with significant psychopathic traits, the VRS demonstrated predictive validity and the dynamic predictors can be used to assess treatment progress, which is linked to a specific criterion variable, thus, fulfilling the criteria for causal dynamic predictor set forth by Kraemer et al.

TL;DR: In this article, a two-component model is proposed to provide a conceptual framework for the treatment of psychopathy, and three studies are reviewed and show positive treatment outcomes for the proposed model.

TL;DR: A cluster analytic examination and validation of psychopathic offender subtypes from 4 combined samples of Canadian federally incarcerated offenders found that secondary variants had higher rates of sexual violence which was largely accounted for by individual differences in baseline static risk.

TL;DR: Analysis of psychometric properties of Hare Psychopathy Checklist-Revised scores in a multisite sample of federally incarcerated Canadian indigenous and non-indigenous offenders found that higher PCL-R scores were associated with higher rates of general and violent recidivism for both ancestral groups, although higher recidivist rates were observed and estimated for indigenous men at specific PCl-R score thresholds.