Table 4 summarizes the primary statistics obtained for response-locked auditory and visual CSD-PCA factors at targeted regions (i.e., where sink or source activity was most prominent). As for the stimulus-locked data, robust auditory old/new P3 source effects were observed over lateral parietal sites, and patients had overall reduced auditory P3 source compared to controls (Figure 9A; cf. factor −150 in Table 4A). There was only a marginal group × condition interaction, and significant old/new effects for auditory P3 source were present in controls, F(1, 38) = 32.2, p < .0001, and patients, F(1, 38) = 9.81, p = .003. Moreover, the left-greater-than-right hemisphere asymmetry of the response-locked auditory P3 source was weaker than its stimulus-locked counterpart, although a simple hemisphere main effect was still present for controls, F(1, 38) = 6.15, p = .02.
