Abstract

Three experiments were performed to isolate some factors influencing colour-selectivity in the tilt aftereffect. Colour-selectivity was found with an interstimulus interval of 20 msec with both a random staircase and PEST method of measurement. Colour-selectivity was reduced with a zero interstimulus interval and eliminated when the inspection and test fields were the same size. It is concluded that while colour-selectivity in the tilt aftereffect is a robust effect, its presence may be modified by a number of methodological and procedural factors.

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