Overlapping a significant left-greater-than-right source asymmetry, a highly significant condition × hemisphere interaction confirmed that the late old/new effects were greater over the left (old vs. new, 0.49 ± 1.14 vs. −0.09 ± 0.94) than right hemisphere (0.02 ± 1.26 vs. −0.24 ± 1.06). There was also a three-way group × condition × hemisphere interaction. Simple group × condition interactions at each hemisphere revealed that a greater old/new effect for controls than patients was highly significant for the left parietal region, F(1, 97) = 11.1, p = 0.001 (old vs. new, for controls: 0.80 ± 0.98 vs. 0.02 ± 0.92; for patients: 0.25 ± 1.20 vs. −0.17 ± 0.94), but less robust for the right, F(1, 97) = 4.04, p = 0.05 (old vs. new, for controls: 0.21 ± 1.15 vs. −0.17 ± 0.99; for patients: −0.13 ± 1.33 vs. −0.30 ± 1.10). Thus, reductions of late parietal old/new effects in patients were also more prominent over the left than right hemisphere (Figure 6DF, column 4).
