Figure 1

Overview of the touch screen representations of the starting position and each eye-hand coordination task. A: starting position. The background color of the touch screen was set to grey (RGB value [0.6 0.6 0.6]) and remained this color during all tasks. The participant fixated the eyes on the white central dot and placed the index finger on the blue bar on the bottom of the screen. B: pro-tapping task. A blue dot appeared that had to be touched as fast and accurate as possible. C: in the dual planning task, the eyes had to be fixated on the red dot while simultaneously the blue dot had to be touched. D: the anti-tapping task required participants to touch the screen on the side opposite of the location of the red dot, mirrored in the y-axis. E: In the spatial memory task, a green dot briefly flashed on the screen while participants were in starting position (E1-3). The instruction was to touch the remembered location of the flashed dot as soon as the starting position disappeared.