PSY 368 Lecture Notes - Lecture 17: Opponent Process, Color Blindness, Dichromatism
8 Nov 2017
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Document Summary
3 receptor syst combine to form 3 opponent syst tht respond in opposite ways to different wavelengths of light. Evidence: color afterimages habituating to blue makes white look yellow, habituating to red makes white look green. Trichromat person w/ normal color vision (i. e. 3 cone receptory types) Rod monochromatism complete color blindness; the world is experienced as shades of gray. Missing all three cone receptors (person has only rods) Associated problems: poor visual acuity, hypersensitivity to light. Dichromatism partial color blindness; world is experienced as shades of blue/yellow or red/green. Hereditary and sex-linked; more common in males. Unilateral dichromat person w/ normal color vision in one eye, dichromatic color vision in other eye. White light falling in center of cell will incr resp. White light falling in surround of cell will decr its response: color red on center/ green off surround cells. Lw light falling in center of cell will incr resp.
