Figure 3

Experimental Design of Experiment II.

Two independent conditions were applied. (a) In the first condition, there were three different distances (1 m, 2.5 m and 4 m) from an object in the visual field, presumably providing different degrees of motion parallax. (b) In the second condition, there were two different instructions for head movement. With the “Head Only” instruction, the participants could only change their head orientation. With the “Head and Upper-body” instruction, the participants could move their upper body in addition to their head. In both cases, the participants were instructed to keep their eyes on the chair (the line of sight is indicated with a grey dashed arrow). (c) Temporal sequence of Exp. II for discriminating between live and recorded scenes. Live scenes or recorded scenes were pseudo-randomly selected and presented (10 sec) interspersed with a 3 sec fixation period. The participants were asked to report whether the scene was live or recorded by pressing a button.