Recent research with psychopathic offenders has clarified the circumstances that modulate sensitivity to incongruent contextual stimuli among psychopathic offenders. Using three variants of the Stroop task, Hiatt et al. (2004) found that offenders with primary psychopathy displayed less interference than controls when incongruent stimuli were spatially or temporally separated from the target stimuli, but they did not differ from controls when the target and incongruent stimuli were spatially integrated. Following MacLeod (1998), the authors proposed that when incongruent and target stimuli are spatially integrated, participants first process both stimuli and must subsequently inhibit the distracting information in order to produce the correct response. Conversely, when targets and incongruent stimuli have different physical characteristics (pictures vs. words), appear in different locations (color words vs. surrounding box color) or at different points in time, or if the demands of the task focus attention on target stimuli and away from inhibitory cognitive or emotional stimuli, it is easier to set an early selection filter that facilitates focusing on the target and ignoring incongruent stimuli. Psychopathic participants appear to be particularly adept at employing such early attention filters; thus, in each of these circumstances, they are relatively impervious to salient distracters. In other words, psychopathic individuals display minimal interference when early selection allows them to filter out distracters, but normal or, as in the current study, greater interference when proper performance requires late selection. Conversely, antisociality appears to be unrelated to differences in early selection but is associated with less efficient late attention systems.