The factor scores corresponding to the GBR components shown in Figure 1 were extracted for electrode sites Fz and Cz, subjected to age-correction procedures described previously, and used in the group analyses (see Table 2). Age-corrected mean total power, evoked power, and PLF z-scores (+/- standard error) are plotted for each group in Figure 2. Note that because z-scores are normed relative to the HC group data, the HC group has mean z-score values of zero for each measure.
