ERP waveform analyses result for state congruency.

a. The ERP waveforms for the stimuli with congruent and incongruent response states (“same” or “different”) of the task-relevant and -irrelevant dimensions at CPz. b. The mean amplitude of the ERP responses to the stimuli with congruent and incongruent response states (“same” or “different”) of the task-relevant and -irrelevant dimensions during the 290–430 ms interval at CPz. c. The correlation between the ERP amplitude difference and RT difference revealed between the incongruent states and congruent states in the color task.