FIG. 4.

Stability of alternation speed of perceptual switching. Twelve of the 17 participants completed both phases of the psychophysical experiment. The interval between the two experiments was longer than 3 weeks. Green triangles indicate the average duration in time of vertical grating perception; red triangles indicate the average duration in time of horizontal grating perception; and blue indicates the average duration in time of all perceptual alternations. The correlation between the two experiments was 0.71 (p<0.01).