Fig. 4.

Range JNDs for four subjects in the presence of a lateral reflector. Bars represent individual thresholds; the subject color code is identical to that of the previous figures. Compared to Experiment 1 (without lateral reflector, bottom panel), all subject benefit from the second reflector when it is positioned at 45°. For lower angular separations (15° or 30°), this benefit is seen only for two subjects (green and red) while for the other two subjects, the lateral reflector is not beneficial.