The impact of cognitive control, incentives, and working memory load on the P3 responses of externalizing prisoners.

•Examined influences on the P3–externalizing relationship in a sample of male prisoners.•Trait externalizing was not associated with a global reduction in P3.•Trait externalizing was negatively related to P3 under specific experimental conditions.•Cognitive control, incentivized context, and working memory load influenced this relationship.