Illustration of the different stimuli used in this study.

<p>Top: opponent motion stimulus, middle: face/house stimulus, bottom: oblique grating stimulus. The arrows indicating movement direction in the motion stimulus were not present in the real stimulus. Each panel shows the stimulus as it was presented to one eye. The stimulus was always positioned directly to the left (as shown for the motion and the grating stimuli) or to the right (as shown for the face/house stimulus) of the fixation point.