PSYCH 1F03 Chapter Notes - Chapter 3: Edwin H. Land, Opponent Process, Color Blindness
31 May 2016
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Document Summary
Basic phenomena of colour vision: complementary colours. 2) trichromatic matching: negative afterimages, colour blindness. Describes how colour information is encoded by retinal receptors. Developed in 1800s by young and helmholtz. Complementary colours are ones that mix together to produce grey. In a colour circle, complements are opposite. When mixed, we see the wavelengths that these colours have in common, rather than grey. Eg. when blue and yellow paints are mixed, the blue contains only blue and green wavelengths, so when it is combined with yellow, the common colour green results. After staring at a colour, if we look at a grey/white surface, we will see the complementary colour. Theory argues that there are three receptors, two of which view colour. Explains how cells higher in visual pathway respond to colour. Grey is produced when a single receptor is struck by both colours at the same time. Colour blindness occurs when one of the opponent-process receptors fails.
