Figure 1.

Experimental setup and task performance. (A) Thirty-right-handed healthy subjects performed 300 repeated trials of billiards shots of the target (red) ball towards the far-left corner. (B) Brain activity was recorded with wireless EEG systems: 20 subjects with eMotiv EPOC+ (left) and 10 subjects with Wearable Sensing DSI-24 (right). (C) The pool balls were tracked with a high-speed camera. Dashed lines show the trajectories of the cue (white) and target (red) balls over 50 trials of an example subject. (D) The mean absolute directional error of the target-ball (relative to the direction from its origin to the center of the target pocket) over blocks of 25 trials, averaged across all subjects, error bars represent SEM across subjects. Written informed consent was obtained from the individual in Figure 1 for the publication of any potentially identifiable images included in this article.