Figure 3. Beta-band time-frequency representations of virtual channels placed at sources identified.

First and second solid lines indicate stop signal reaction time (SSRT) and SSRT_max; first and second dotted lines indicate 10% and 50% percentiles of RT_AC-GO for selected AC-GO trials with RT_AC-GO > SSRT (RT_AC-GO is the duration between AC-GO signal and button press, see Figure 1A). Time axis locked to STOP and AC-GO signal (0 s). All plots show the results of a cluster-based permutation test, two-tailed, $\alpha$_cluster = 0.05, n = 59, significant clusters are outlined. (A) Task-versus-baseline power for successful stop (sSTOP) trials. (B) Task-versus-baseline power for correct attentional capture go (cAC-GO trials). (C) Contrast of z-transformed sSTOP versus cAC-GO trials. (D) Averaged beta-band power (12–32 Hz). Orange curve (solid line): sSTOP trials, green curve (dashed line): cAC-GO trials, bounded lines: standard error of the mean.