PSYC 212 Lecture Notes - Lecture 13: Hermann Von Helmholtz, Qualia, Scotopic Vision
17 Apr 2017
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L-cones: long, red: photopic: light intensities bright enough to stimulate cone receptors, saturate rod receptors to max response. Sunlight, bright indoor lighting: scotopic: stimulate rods, but not enough for cones. Discrimination: single photoreceptor shows different responses to lights of dif wavelengths but same intersity, principle of univariance: infinite sets of dif wavelength intensity combinations can elicit exactly the same response from a single type of photoreceptor. One type of photoreceptor can"t make color discriminations based on wavelength. Inverted qualia: john locke what if violet produced in man"s mind by his eyes, were the same that a marigold produces in another man"s. Yes, qualia is something real even though it is subjective: rods. Sensitive to scotopic light levels, rhodopsin, same senisitiviy to dif wavelengths don"t see color. Trichromacy: theory that color of any light is defined in our visual system by the relationships of 3 numbers, the outputs of 3 receptor types (cones)
