at different times relative to the response. That is, N2 occurs prior to correct responses and the ERN occurs following erroneous responses (Carter et al., 1998; van Veen & Carter, 2002; van Veen, Cohen, Botvinick, Stenger, & Carter, 2001; van Veen, Holroyd, Cohen, Stenger, & Carter, 2004; Yeung et al., 2004). Collectively, these results raise the possibility that ERN-like activity might reflect both error-detection and the more general detection of response conflict on correct trials.
