A univariate ANOVA showed that there was no significant group difference on accuracy of responding to target stimuli (F(2, 140) = 2.80, P = 0.07). Group means (±SE) for accuracy were (of 35 total targets) NAC: 34.55 ± 0.14, LTAA: 34.02 ± 0.18, and STAA: 34.39 ± 0.21. An ANOVA revealed a significant group main effect for reaction time for pressing the response box button to targets (F(2, 140) = 3.52, P = 0.03). Tukey's HSD post hoc tests showed that NAC (mean = 422.20 msec ± SE = 7.78) responded slightly faster on average than did LTAA (455.22 msec ± 9.85), while STAA (439.59 msec ± 11.60) did not differ from either NAC or LTAA.
