Abstract

The present study explored the effects of adaptation to static and moving chromatic stimuli on the perceived brightness of afterimages projected on static and turning achromatic test stimuli The Ss were presented with two stimuli of the same color to which they adapted for 1 min. The Ss then reported the brightness of their afterimages when viewing achromatic stimuli. A rotating stimulus, viz, 16, 45, or 78 rpm. was compared with a stationary stimulus. Results indicate that (a) the introduction of movement detracts from the brightness of an afterimage, and (b) a speed of 45 rpm affects the afterimage more than 16 or 78 rpm.

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