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Psychopathy and substance dependence (SUD) is highly prevalent in incarcerated populations and tends to co-occur in the same individuals. The factors underlying this relationship are not clearly understood. The primary purpose of this study was to investigate whether two personality models mediate the relationship between psychopathy and substance misuse in male offenders. Ninety-two inmates in provincial correctional centers in New Brunswick completed questionnaires, including the Sensitivity to Reward Sensitivity to Punishment Questionnaire to measure behavioral activation and behavioral inhibition, the Substance Use Risk Profile Scale to measure anxiety sensitivity, introversion/hopelessness, sensation seeking and impulsivity, and the Psychopathic Personality Inventory-Revised to assess psychopathy levels. Results revealed that high impulsivity indirectly mediated the relationship between psychopathy and stimulant dependence. In addition, low anxiety sensitivity indirectly mediated the relationship between psychopathy and opioid dependence. Finally, impulsivity indirectly and inconsistently mediated the relationship between psychopathy and alcohol dependence. These results suggest that individuals with psychopathic traits are at increased risk of misusing certain drugs due to underlying personality-based differences., (Copyright © 2012 Elsevier Ltd. All rights reserved.)

Despite the widespread rise of online poker playing, there is a paucity of research examining potential predictors for excessive poker playing. The aim of this study was to build on recent research examining motives for Texas Hold'em play in students by determining whether predictors of other kinds of excessive gambling apply to Texas Hold'em. Impulsivity, negative mood states, dissociation, and boredom proneness have been linked to general problem gambling and may play a role in online poker. Participants of this study were self-selected online poker players (N = 179) who completed an online survey. Results revealed that participants played an average of 20 hours of online poker a week and approximately 9% of the sample was classified as a problem gambler according to the Canadian Problem Gambling Index. Problem gambling, in this sample, was uniquely predicted by time played, dissociation, boredom proneness, impulsivity, and negative affective states, namely depression, anxiety, and stress.