PSY280H1 Chapter : Ch9 Textbook Notes
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PSY280H1 Full Course Notes
Verified Note
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Document Summary
Signals function; helps us identify and classify things: observers recognize appropriately coloured objects quicker and more accurately. Facilitates perceptual organization by improving the ability to tell one object from another and picking out objects within a scenes. Proposed that colour vision may have evolved for the purpose of detecting fruit. Colour spectrum: short=blue, medium=green, long=yellow and red: extraspectral colours don t appear in the spectrum (brown, purple) Saturation, the amount of white in a colour; adding white decreases saturation. 400-450nm appear violet; 450-490nm appear blue; 500-575nm appear green;575-590 appear yellow; 590-620nm appear orange; 620-700nm appear red. The colours of objects are largely determined by the wavelengths of light that are reflected from the objects into our eyes: e. g. black and white paper reflect all wavelengths equally across the spectrum. Selective reflectance, the property of reflecting some wavelengths more than others: chromatic colours or hues reflect some wavelengths more than others, achromatic colours reflect all wavelengths equally (white, black, greys)
