PSYCH 1XX3 Lecture Notes - Lecture 10: Human Factors And Ergonomics, Color Blindness, Electromagnetic Spectrum
27 Feb 2017
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Document Summary
Colours around you are just in your head. Colours are different from one individual to another. Visual spectrum is just part of a continuum. Limits of visual detection bias your view. Unique combined receptor activity produces distinct colour perception. The more overlap the less colours you see: a great overlap could lead to colour blindness. Can colour blindness be treated: red/green colour blindness is most common type, enchroma glasses. Filter out wave lengths of light of overlap (builds more contrast) Some humans have a mutant gene to code for a fourth colour receptor. Why would colour information evolve: ability to show poison (frogs, ability to blend into environment. Adaptive significance: foraging hypothesis: being able to spot ripe fruits and berries, trichromats foraged more orange, but equal at green, performance equal when viewing distance was less than 0. 5m. Adaptive significance: facial hue hypothesis: when it comes to sexiness, redder is better, in a study women changed the hue on a photo.
