PSYCH 1XX3 Lecture Notes - Lecture 6: Ganglion Cell, Tetrachromacy, Lightdark

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Human is bias to assume world is experienced the same as they perceive. Vision is simply perceiving light/energy in the form of electromagnetic radiation. Why is colour information important: frog that is colored with an orange back is using a different way to keep predators away it is showing its predator that it is toxic. Adaptive significance: foraging hypothesis: there was an experiment conducted to see whether marmosets that were trichromatic had any adaptive advantage over those that were dichromatic. The experiment involved putting orange cereal kix throughout the grass field and seeing whether trichromatic species were able to pick it out more effectively than dichromatic species. Results demonstrated that there was an advantage. There are three different types of cones corresponding to short, medium, and long wavelengths of light (short corresponds maximally to 450 nm blue, medium responds to 530 nm green, long maximally responds to 560 nm red)

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