Table 1. Dimensions of the stimuli in the illusory depth experiment.

Viewingdistance	Diameter of disc stimulus		Stimulus disparity incrossed-disparity condition
	on screen	in visual angle	separation on screen
5 cm	2.0 cm(74 pixels)	22.6o	0.4 cm(15 pixels)
7 cm	2.8 cm(104 pixels)	22.6o	0.72 cm(27 pixels)
10 cm	4.0 cm(148 pixels)	22.6o	1.2 cm(45 pixels)