Figure 2.

Behavioral task. (A) Each block of trials started with the presentation of an instruction cue (1s) indicating the likelihood of a stop‐signal. (B) Participants viewed a vertically oriented indicator that increased from the bottom up at constant velocity reaching the top in 1s. The indicator could be stopped by releasing the mouse key with the right index finger. (C) Participants were required to stop the indicator as close to the target (800 ms) as possible. (D) The bar stopped automatically on 20% (low stop‐signal probability condition) or 40% (HSP condition) of the trials. The time at which the bar stopped was adjusted online using two staircase algorithms to achieve 50% success on Stop trials. [Color figure can be viewed at http://wileyonlinelibrary.com]