Separate 3 Group (HC, CHR, YSZ) X 2 site (Fz, Cz) repeated measures analysis of variance (ANOVA) models were performed on each of the age-corrected GBR dependent variables (total power, evoked power, PLF). Significant Group effects were further parsed with a priori planned contrasts. Converters and non-converters were compared on total power, evoked power, and PLF, using a 2 Group (converters, non-converters) X 2 site (Fz, Cz) repeated measures ANOVA.
