Figure 1.

(A,B) Stimuli: stereo-pair of static frames taken from the stereo videos: lateral view (A) and frontal view (B); (C,D) positions of the fixation points in lateral (C) and frontal (D) runs of the first main experiment: yellow, behind the object, blue, in front; in (A,B) yellow dots: fixation point; in (C,D) red asterisks indicate the 2 fixation points used in half of the subjects, the black asterisks those used in the other half during the first session of experiment 1; Fixation points were swapped during the second session, thus all subjects used all 4 fixation points in experiment 1; in individual runs upper and lower fixation points were alternated.