Illustration of a single trial of the experiment.

Each trial consisted of an introduction period of 2 s, a task period of 10 s, and an inter-trial rest period (stop and rest) of 16–18 s. During the introduction period, a random task (MA, MI, or IS) was displayed to the participant. After a short beep, the participant performed the task displayed in the introduction period while looking at a fixation cross. When a STOP sign was displayed with a second short beep, the participants stopped performing the task and relaxed during the random-length inter-trial rest period.