Although there is debate over whether the NoGo N2 reflects inhibition of the prepotent response (e.g., Falkenstein et al., 1999; Jodo and Kayama, 1992; Kok, 1986; Kopp et al., 1996) or detection of response conflict (Botvinick et al., 2001; Nieuwenhuis et al., 2003; van Veen and Carter, 2002; Yeung and Cohen, 2006; for review see Botvinick et al., 2004; Ridderinkhof et al., 2004a), there appears to be consensus that the N2 is a marker of a general control process that operates in a variety of situations (Nieuwenhuis et al., 2004).
