The effect of lightness contrast on the colored Müller-Lyer illusion.
Two subjects estimated the length of the central line in red and blue Müller-Lyer figures that were viewed both foveally and parafoveally. The illusion figures were defined by either lightness and hue differences between figure and ground or by a hue difference alone. For both subjects, the figures defined solely by hue produced larger illusions. Since depth-cue scaling and other cognitive factors did not cause the enlargement, it was concluded that the robust, hue-produced illusions resulted from contour interactions generated within parvocellular channels that are specialized for coding color.
Pollack
R H
RH
Department of Psychology, University of Georgia, Athens 30602.
Jaeger
T B
TB
D000328:Adult; D001288:Attention; D003118:Color Perception; D006801:Humans; D008027:Light; D009903:Optical Illusions; D009949:Orientation; D010469:Perceptual Distortion; D011601:Psychophysics; D012858:Size Perception