this subjective expectation. The current findings related to reward are also consistent with previous reports showing larger P3 amplitude following reward feedback than no-reward feedback (Hajcak et al., 2007), which might indicate higher motivational significance of reward feedback (see Sato et al., 2005). Finally, the response also displayed an interaction pattern, wherein the difference between low- and high-difficulty trials was larger for rewarded trials. This latter interaction seems to represent a combination of performance monitoring of correct performance on the one hand, and of reward outcome evaluation on the other.
