Retaliatory and monetary reward-seeking responses displayed for reactive aggressive participants (RA) and controls for the single fMRI run for which brain responses have been analyzed (left), and mean responses across the four fMRI PSAP runs (right; responses were collapsed across runs as there was no effect of run and run x group interaction on behavioral responses). There were no significant differences between groups for the single fMRI run. Averaged across the four fMRI runs, RA individuals worked significantly more than controls to earn money, but not to retaliate. Abbreviations: fMRI, functional-magnetic resonance imaging; n.s., not significant; PSAP, Point-subtraction aggression paradigm. *p < 0.05.