In addition to the novelty vertex source, the response-related F – CP+, which corresponds to a late frontally inverting positivity, was also reduced in patients. This late source was negatively correlated with self-ratings of both depression (BDI) and physical anhedonia. It presumably reflects a response-related deficit, possibly owing to patients with melancholic or anhedonic forms of depression (see also Bruder et al., 1991).
