the left than right hemisphere, and a significant simple hemisphere effect was again observed for controls only, F(1, 38) = 14.8, p = .0004, but not for patients, F(1, 38) = 1.45, p = .24, providing the basis for a marginally significant group × hemisphere interaction. An additional analysis for the frontopolar source of factor 490 using sites Fp1/2 (Figure 5D) revealed only a significant right-larger-than-left hemisphere main effect, F(1, 38) = 5.72, p = .02, but no group or condition effects. Thus, at off-midline parietal sites, patients showed also markedly reduced and less asymmetric old/new effects for visual P3 source.
