As previously seen for visual items, the early mid-frontal old/new source effects were accompanied by mid-parietal old/new source effects (Kayser et al., 2003, 2007, 2009), but again, there were no group differences. However, the underlying P3 source was greater for controls than patients during face recognition, and consisted of bilateral medial-parietal maxima in controls across tasks, but had a mid-parietal maximum in patients for words. This also matches the reduced left inferior parietotemporal P3 source observed during visual word encoding in schizophrenia (Kayser et al., 2006). All of these findings add to the notion that schizophrenic patients are impaired during the encoding of linguistic information requiring left-lateralized resources subserving language functions (e.g., Price, 2000; cf. Crow, 1997; Condray, 2005).
