FIGURE 4.

Response‐locked time‐frequency averages of brain‐behavior relations between theta (4–7.5 Hz) ITPC and flanker task reaction time variability (RT‐SD) in Go trials. The panel on the right depicts t‐values for full time‐frequency (1–30 Hz) averaged over parieto‐occipital electrodes. Black lines highlight clusters in the data smaller than the prespecified threshold (α <.025). t = 0 corresponds to the response. (a) Left side: t‐values for theta ITPC‐RT‐SD relations after sham stimulation in the high‐impulsive group averaged between 500 ms pre‐ and 380 ms postresponse. (b) Left side: t‐values for theta ITPC‐RT‐SD relations after verum stimulation in the low‐impulsive group averaged between 440 and 80 ms preresponse. (c) Left side: t‐values for theta ITPC‐RT‐SD relations after sham stimulation in the low‐impulsive group averaged between 500 ms pre‐ and 200 ms postresponse