P3s were analyzed in a similar fashion. They were larger on NoGo (M= 5.20±.45V) relative to Go trials (M= 4.19±.39V) and were larger at FCz than other sites, F(1,26) = 44.07, p < .001, η2 = .63. There was no main effect of group, but an interaction between group and site, F(1, 26) = 4.73, p = .023, η2 = .15, was based on offenders generating P3s of smaller amplitude at the most frontal site (Fz) compared with controls,3 an effect that was unrelated to Trial-type.