Psychopathy and Decision-Making: Antisocial Factor Associated With Risky Decision-Making in Offenders

Prefrontal tDCS modulates risk-taking in male violent offenders

Detrimental decision-making is a major problem among violent offenders. Non-invasive brain stimulation offers a promising method to directly influence decision-making and has already been shown to modulate risk-taking in non-violent controls. We hypothesize that anodal transcranial direct current stimulation (tDCS) over the right dorsolateral prefrontal cortex beneficially modulates the neural and behavioral correlates of risk-taking in a sample of violent offenders. We expect offenders to show more risky decision-making than non-violent controls and that prefrontal tDCS will induce stronger changes in the offender group. In the current study, 22 male violent offenders and 24 male non-violent controls took part in a randomized double-blind sham-controlled cross-over study applying tDCS over the right dorsolateral prefrontal cortex. Subsequently, participants performed the Balloon Analogue Risk Task (BART) during functional magnetic resonance imaging (fMRI). Violent offenders showed significantly less optimal decision-making compared to non-violent controls. Active tDCS increased prefrontal activity and improved decision-making only in violent offenders but not in the control group. Also, in offenders only, prefrontal tDCS influenced functional connectivity between the stimulated area and other brain regions such as the thalamus. These results suggest baseline dependent effects of tDCS and pave the way for treatment options of disadvantageous decision-making behavior in this population.

Careful When You Click? How the Dark Triad of Personality Can Influence the Likelihood of Online Crime Victimization

Cybercrime is a growing problem, with increasing numbers of people reporting they have been a victim. However, the literature has tended to focus on the characteristics of the perpetrator and has often neglected to examine how the individual differences of victims may have an impact. This paper investigates how the Dark Triad - Machiavellianism, narcissism, and psychopathy - may increase the chances of being a victim of online crime. To do this, the Cyber Routine Activities Theory was applied, which suggests victimization is a result of two things: 1) a user's routine online activity which may bring them into contact with nefarious others and/or makes them an attractive target, and 2) the lack of a "capable guardian" who can defend against such nefarious others. Using an online survey (N = 328), we measured Internet users' Dark Triad traits, along with their engagement in various online activities and the preventative measures used against potential criminals. Findings demonstrated that narcissism and psychopathy increased the likelihood of victimization, but Machiavellianism did not. These relationships were moderated by gender. However, contrary to other work using the Cyber-RAT, preventative measures (e.g. knowledge of computers, presence of anti-virus programs) did not seem to impact on the likelihood of victimization. The challenges of using these findings to reduce cybercrime and future work are then discussed.