Infant Stop Signal Anticipation Task

The Stop Signal Anticipation task measures response inhibition, which is considered an important aspect of behavioral control. In the task, children are instructed to stop a moving bar (a "frog's tongue") at a specific location (go trials) by pressing the space bar.

In some trials, the bar stops moving (stop signal) and participants need to inhibit their stopping response. A cue at the beginning of the trial indicates the probability that the bar will stop (a yellow frog meaning the probably of stopping is low, a purple frog if it is high). The onset of the stop signal varies from one trial to the next according to a staircase procedure that is dependent on the participant’s response time (Zandbelt et al., 2008).