FIGURE 1.

Visual scene and experimental task. (A). The visual scene represented an avatar lying supine on the ground under a tree. Participants performed the interception task, while laying supine on a gym mat, like the avatar in the virtual environment. On the right side of the avatar, an adult male figure stood upright holding an orange stick with a ring at its end. (B). Point of view of the scene from the avatar/participant perspective when lying supine and with the gaze directed at the center of the ring. On each trial, a red ball dropped vertically from the tree branches, approaching the participant’s head. Participants were instructed to press the right button of a computer mouse to intercept the ball as it passed through the ring, while maintaining the gaze fixed.