the P3-peak. Generally, grand means for delta were larger than those for theta, as reflected by the less intense heat-maps for theta relative to delta (which were plotted using the same color scale). Most extant literature has focused on electrode site PZ over temporal/parietal cortex (Euser et al., 2012; Iacono et al., 2002), but cortical generators for P3 are also thought to exist in the frontal lobe (Polich, 2007). Therefore, we selected scores for subsequent analyses from midline-frontal (sites AFZ, FZ, F1, F2, and FCZ) and midline-parietal (CPZ, PZ, P1, P2, and POZ) regions.
