Three additional tasks were included to assess response output and timing processes in mord de tail.
the first required finger tapping in synchrony with a sensory input at the rate designated by the stimulus onset.
the second required the child to finger-tap continuously when a plane appeared on the screen, to periodically interrupt the tapping when a stop signal appeared, and to resume tapping when the plane reappeared (after 2500ms).
the third task required tapping to be synchronized with the appearance of a plane that appeared every 5 s for 200 s (the delay task).