PSYCH 1XX3 Lecture Notes - Lightdark, Opponent Process, Receptive Field
8 Dec 2013
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Document Summary
Birds, fish, reptiles and insects have excellent colour vision. Colour vision is limited to primates including humans among mammals. Dogs and cats can only see shades of grey. Primates colour vision is especially well suited to distinguish red and yellow against green background. This adaptation helps foraging for fruit in the bushes and trees. One possible biological advantage of colour vision for primates is the ability to detect colour objects in the wild as well as predators or prey. Seeing the richness of soil, ripeness of fruit can predict weather. In birds, the colour of potential mates feathers provides signals to other birds about how healthy the bird is and can influence how likely that bird is chosen as a mate. Primary colours: the 3 colours can be combined in various proportions to make every colour in the spectrum, are like base colours, cannot be reduced into other colours.
