Fig. 3.

Design of the experimental task. In a blocked design, each 20 s experimental block began with auditory instructions signalling the order in which the hand gestures were to be performed plus the task instruction (e.g. “B, A, C, Go”). The three gestures were performed at a frequency of approximately one action per second, in a repeating cycle, until the end of the block (signalled by an auditory “Stop” instruction). After each experimental block, participants closed their eyes for 16 s.