PSYC 2220 Study Guide - Final Guide: Subjective Constancy, Tonotopy, Motion Sickness
19 Jun 2016
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Document Summary
It serves important signalling functions, provides many colour signals that help us identify and classify things. It helps facilitate perceptual organization, by which small elements become grouped perceptually into larger objects. Makes it easier to tell one object from another and to pick out objects from a scene, which is important for survival of many species; enhances contrast. Colour vision may have evolved for the express purpose of detecting fruit. Can describe all the colours we perceive by using the terms blue, green, yellow, red, and combinations of those terms. Those four terms are considered pure or unique colours. We can create even more colours by changing the intensity of the light to make colours brighter or dimmer, or by adding white to change a colour"s saturation. Shorter wavelengths associated with purples/blues, longer is yellows/reds. Reflectance curves: plots of the percentage of light reflected versus wavelength; chromatic hues have peaks in certain spots, achromatic are flat.
