Stop signal task

The stop signal task (SST) is a task designed to measure response inhibitions and the response inhibition reaction time (impulse control). In this test, an arrow pointing left or right is shown on the screen. First, the participants were instructed to press on the corresponding (left/right) button on a press pad as soon as they see the direction of the arrow. In the next phase of the task, the participants were instructed to press on the corresponding button like before, but should not press the button when they hear a beep (the stop signal). The stop signal reaction time (SSRT) was calculated by subtracting the stop signal delay from the median go reaction time (the reaction time on trials with no stop signal). SSRT was selected as the main outcome measure.