Cyclopean perception and neurophysiology.

development functions because aftereffects decay at a rate dependent on the period of inspection. It is necessary to do careful psychophysics to unconfound these factors. There might be value in examining color and brightness adaptation by the same approach. SCHILLER: YOU showed an illusion occurring as vertical oriented lines rotated around a corner to become horizontally oriented lines, and you attributed it to a Mach band-like effect between orientated units. I found that if I fixed my eye on one point I couldn't get the effect and wonder whether it is due instead to eye movements? OVER: This could be answered by measuring the illusion with tachistoscopic presentation of the figure or during retinal stabilization. We have not studied the effect in this way, but Pritchard found that geometrical illusions are still produced with stabilization (Pritchard, R.: Visual illusions viewed as stabilized retinal images, Q. J. Exp. Psychol. 10: 77, 1958).