“…Numerous models have attempted to describe the functions of the ACC, including conflict monitoring (Botvinick et al, 2004; Carter et al, 1998) error likelihood (Brown and Braver, 2007, 2005), outcome unexpectedness (Oliveira et al, 2007; Jessup et al, 2010), volatility (Behrens et al, 2007), error monitoring (Holroyd and Coles, 2002; Steinhauser et al, 2008) and simple time-on-task (Carp et al, 2010; Grinband et al, 2010). While each of these theories has accounted for certain aspects of ACC function, each fails to account for certain important phenomena.…”