Theta response as a function of psychopathy. Results for novel trials (left) show that as psychopathy increases, the valence contrast of the theta response (i.e. unpleasant vs pleasant) decreases (B=−.038, p=.111), but during familiar trials (right) as psychopathy increases, the valence contrast of the theta response increases (B=.048, p=.042). Error bands are set at 1 standard error.