Figure 5.

Illustration depicting the stimulus configuration employed by Radonjic et al. (2010) and Radonjic and Gilchrist (2013) to reexamine the effect of depth on lightness matching. The upper target (covered with black paper) extended from the white side of the cube such that it was seen against the black side. The lower target (covered with white paper) extended from the black side of the cube such that it was seen against the white side. The display was lit from the right such that the white side of the cube and the black target extending from it were highly illuminated, while the black side of the cube and the white target extending from it were shadowed and dimly illuminated. Illumination was adjusted so that the upper (black) target and the lower (white) target were equiluminant. When viewed binocularly (A) the targets were seen veridically in depth and therefore also in illumination. When viewed monocularly, however, [as depicted in (B)] the targets appeared to switch depth planes (due to a loss of depth information) and therefore also switched their perceived illumination.