Construct Validity of Stable-2000 and Stable-2007 Scores

We addressed the construct validity of Stable-2000 and Stable-2007 scores by examining correlations between selected items and validated independent measures of relevant constructs in samples of convicted sex offenders. In Study 1, the Child Molester Attitudes item of the Stable-2000 shared 23% of the variance with a self-report measure of beliefs supportive of child molestation, r(19) = .48. The Deviant Sexual Interests items of the Stable-2000 and Stable-2007 shared 7% to 66% of the variance, respectively, with an offense-history-based measure of pedophilic interests, r(18) = .27 for the Stable-2000 and r(11) = .81 for the Stable-2007. In Study 2, the Lovers/Intimate Partners, General Social Rejection/Loneliness, Rapist Attitudes, and Child Molester Attitudes items of the Stable-2000 shared 4% to 19% of the variance with self-report measures of, respectively, intimacy, r(90) = -.44; loneliness, r(88) = .34; beliefs supportive of rape, r(72) = .21; and beliefs supportive of child molestation, r(78) = .36. The results generally suggest that the Stable items examined are associated with measures of similar constructs; however, the degree of convergence was lower than expected. More systematic and comprehensive research is needed to examine convergence of the Stable items with other relevant measures and additional aspects of construct validity. Such efforts will provide a clearer understanding of dynamic risk factors, appropriate areas of focus for treatment efforts, and, more generally, why some sex offenders recidivate

Factor Structure of the Bumby RAPE Scale: A Two-Factor Model

Rape-supportive cognition is both theoretically and empirically related to rape. Several types of rape-supportive cognition (cognitive distortions) have been identified in the literature, suggesting that rapists' rape-supportive cognition may be multidimensional. The Bumby RAPE Scale is one measure of rape-supportive cognition. The authors conducted an exploratory factor analysis using polychoric correlations to examine the types of rape-supportive cognition assessed by the Bumby RAPE Scale with a sample of 280 adult male sex offenders. A two-factor model was found; the two factors were labeled Excusing Rape and Justifying Rape. The current study suggests that the Bumby RAPE Scale is multidimensional. This factor structure may provide greater precision and clarity in the assessment of rape-supportive cognition, which may facilitate more informative research and, ultimately, contribute to more effective sex offender treatment and management