The insignificant group × stimulus interaction indicates that the pattern of group effects at each level of stimulus is the same. Separate one-way between-subjects MANOVAs for each level of stimulus confirmed this finding, showing significant group effects for the target, rare non-target and standard non-target stimuli, with less reference θ power in the LTAAs vs. the NACs (Table 2 shows the one-way MANOVA results for the reference θ power for the target stimulus). Post-hoc analyses on the significant group effects showed that the effect was significant at all MESOIs, with the largest effects on average across the three stimulus types being at central and parietal electrode sites.
