The improved inhibitory processing after olanzapine was most evident after the 0.033 mg/kg dose, though improved TC ratios were also seen after 0.01, 0.1 and 0.33 mg/kg. Asterisks mark post-olanzapine time points at which the TC ratio was significantly different from the average of the baseline TC ratio, as determined by Fisher’s LSD (*p<0.05, **p<0.01). Data are mean ± SEM. For all doses, n = 8.