In contrast to the evoked ERO power findings, Andrew and Fein (In Press) presented results that gave a weak indication that total θ ERO power provided additional discriminatory information beyond ERP measures for differentiating the LTAA and NAC groups. As total ERO power contains both evoked and non-phase-locked activity, the evoked θ power may dilute an effect of induced power in the total θ ERO power. While the evoked δ and θ ERO power were spatially localized over the parietal region, similar to the posterior localization of the P3b amplitude, the total θ ERO power had a more anterior localization.
