Abstract

Using a magnitude estimation method, an assessment was made of the nature and strength of the hue induced into an initially white test field by an adjacent chromatic inducing field delivered to the same eye. On half the trials, a metacontrast mask, seen as flanking the inducing field but delivered to the other eye, eliminated the perception of the inducing field without having any direct effect upon the appearance of the test. Strength of induction with the mask was only a small fraction of its unmasked value. Because the mask could not have affected any retinal component of induction, it is concluded that the basis of the chromatic induction is largely or entirely nonretinal.

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