The significant group × stimulus interaction effect (F(10,85) = 2.669; p = 0.007) accounts for 23.9% of the variance. Separate between-subjects one-way MANOVAs for each level of stimulus were used to further investigate this interaction effect. The results indicate that the absolute θ power significantly discriminated the groups for the non-target (rare and standard) stimuli, with less absolute θ power in the LTAAs vs. the NACs. Post-hoc analyses showed that the effects were significant across all MESOI, with the largest effects over parietal electrode sites. For the target stimulus, the group effect was not significant.
