Abstract: In excitation purity or with eyes closed,the decay process of the McCollough effect lasted for a long tin1e (more than 24 hours) after adaption.However,by anti-adaption, this color after-effect could be cleared up within one-third of an hour.The color of anti-adaption grating was complementery to that of adaption grating,and the spatial frequency of the anti-adaption grating was the same as that of the adaption grating. Brightness and spatial frequency had effect on this elimination.It was suggested that the decay process of the McCollough effect was dependent upon the pattern of retinal stimulation.

Key words: Vision perception, Color vision, Color illusion, McCollough effect