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  • Title: The effect of lightness contrast on the colored Müller-Lyer illusion.
    Author: Pollack RH, Jaeger TB.
    Journal: Percept Psychophys; 1991 Sep; 50(3):225-9. PubMed ID: 1754363.
    Abstract:
    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.
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