probability Go/NoGo tasks (Bjork, Hommer, 2004, Goudriaan, Oosterlaan, 2005, Noel, Van der Linden, 2007, Thoma et al., 2007) as well as with frequent Go/rare NoGo tasks (Salgado et al., 2009). Similarly, results for reaction time to the Go trials are also mixed (refer to Smith et al., 2014 for a meta-analysis). Therefore, with respect to behavioral performance on Go/NoGo tasks, findings are at best equivocal in the literature. However, based on a meta-analysis, Smith, Mattick (2014) have concluded that their findings are generally consistent with the view that substance use disorders and addiction-like behavioral disorders are associated with impairments in inhibitory control. On the other hand, the direction of the behavioral performance results on the Go/NoGo task, i.e., high (significant) omission and low (nonsignificant) commission errors, coupled with longer (nonsignificant) reaction time on the Go trials in the present study, suggest general slowness in the suppression as well as execution of a motor response in alcoholics. It is probable that by virtue of the psychomotor slowness, alcoholics had more omission errors, fewer commission errors, and slower reaction time on the Go trials. This general slowness in the activation of goal-directed responses is confirmed in previous studies as well. Ortner et
