1,200 ms after stimulus onset when participants responded incorrectly. Participants were instructed that speed and accuracy were equally important for making a correct response. In the next, experimental, phase, EEG was recorded. Participants were informed that each correct response would earn a reward. However, each subject received a predetermined fixed amount at the end of the experiment without deductions for errors, although they were not informed of this while performing the task. The probabilities of occurrence of go and no-go stimuli were equal (50/50), and the order of stimulus presentation was randomized. The intertrial interval was 2,400 ms. Go and no-go accuracy and go reaction time at each assessment also were recorded and used in statistical analysis.
