Fig. 1

The Chasing Memo Task. a Background display for the motor tracking task. Participants were instructed to track fish Memo around the screen by keeping the mouse within the green zone surrounding the target. On each trial, a counter was displayed on the bottom right of the screen which displayed the points earned during successful tracking; b When the circle turned from orange to blue, participants started tracking either at will (intentional condition) or as quickly as possible (cued condition); c During successful tracking, the half-circle red bar gradually turned green, signaling that the participant started to earn points; d In the cued condition, the circle switched back to orange to signal that the participant has to stop tracking as quickly as possible; e In the intentional condition, the appearance of a star indicated the beginning of a time window in which the participant can earn additional bonus points. In these trials, participants can decide voluntarily when to disengage from motor tracking in order to collect the bonus points