Deficits in inhibitory control have consistently been reported in a variety of psychiatric disorders, such as substance use disorders, including alcohol use disorders (Bauer, 2001; Kaufman et al., 2003; Kouri et al., 1996), attention-deficit hyperactivity disorder (Brandeis et al., 2002; Frank et al., 1998; Pliszka et al., 2000; Rubia et al., 1998), antisocial personality disorder (ASPD) and conduct disorder (Bauer and Hesselbrock, 1999a, b; Kiehl et al., 1999; Kiehl et al., 2000), obsessive compulsive disorder (OCD) and Tourette syndrome (Johannes et al., 2001; Johannes et al., 2003; Schall et al., 1996), as well as in Schizophrenia (Fallgatter and Muller, 2001; Weisbrod et al., 2000).