Fig. 5. (A) Same as Fig. 2B (shown for comparison with B). (B) Results from experiments in which the left-hand and the right-hand walls carry stationary black-and-white square-wave gratings of equal spatial period (
=14.9°), but one of the walls (the left-hand wall in the left figure and the right-hand wall in the right figure) is higher (h=0.19 m) than the other (h=0.11 m). Red line, midline of channel; orange line, position at which the heights of the left and the right walls appear to subtend equal visual angles (compare Fig. 4B). N=23 (left figure) and N=34 (right figure). For further conventions, see Fig. 2A.
