This report did not include analyses of earlier, mostly stimulus-driven visual components (P1, N1), which have been found to be reduced in schizophrenia and interpreted as indication for of an early perceptual processing deficit (e.g., Bruder et al., 1998; Doniger et al., 2002; Butler et al., 2007; Javitt et al., 2008; Javitt, 2009; Salisbury et al., 2009). However, given the patients’ adequate behavioral performance across tasks, combined with an intact and robust ERP/CSD component structure, we would argue that any group differences in early perceptual processing were of subordinate importance to their later, task-specific electrophysiologic abnormalities of verbal episodic memory. A different case can be made for N2, a component linked to stimulus categorization, for which we and others have repeatedly found robust reductions in schizophrenia across stimulus modalities (e.g., O’Donnell et al., 1993; Bruder et al., 1998, 1999; Kayser et al., 1999, 2001, 2009; Alain et al., 2001, 2002; Umbricht et al., 2006). A cursory inspection of the CSD waveforms suggested that the previously reported reductions in patients were also present in the current data, and we will address
