Whereas anterior cingulate involvement in the generation of visual and auditory N2 sink activity may be debatable, there is little doubt that the response-related, midfrontal negativity (FRN) belongs to the class of ERN-like components attributed to generators within the ACC (e.g., van Veen and Carter, 2002, 2006). The present findings of markedly smaller auditory FRN in patients, combined with their reduced old/new sink effects across modalities, matches previous evidence of reduced error-related and feedback negativity in schizophrenia (e.g., Kopp and Rist, 1999; Mathalon et al., 2002; Alain et al., 2002b; Bates et al., 2002; Morris et al., 2006, 2008), which is likely linked to structural and/or functional ACC impairments (e.g., Carter et al., 2001; Laurens et al., 2003; Baiano et al., 2007; Polli et al., 2008). Still, only correct trials were analyzed in the present study, which appears to be at odds with prior reports of normal or even larger CRN amplitude in schizophrenic patients (e.g., Kopp and Rist 1999; Mathalon et al., 2002). However, a comparison of these findings may be difficult due to differences in experimental task and
