COGS 100 Lecture Notes - Retina, Thalamus, Complementary Colors

• School: Simon Fraser University
• Department: Cognitive Science
• Course: COGS 100
• Professor: Michael Picard

Document Summary

Galileo (1623) the book of nature is written in language of. Newton (1721) for the rays, to speak properly, are not. Colour is a secondary quality, a relation between light entering eye and brain function, a construct of the mind, not a quality in objects. (colour is within us) Primary qualities are quantifiable, mathematical, and external. math. coloured. Adding pigments subtracts reflected wavelengths (by expanding range of absorption) Three main physical properties along with their corresponding mental qualities: Dichromatic (colours but no red); achromatic (black and white) Opponent-process theory (hering 1834-1918) states that colour wision came about from three opposing process. Blue and yellow (red and green) rarely reported as present in the same stimulus colour. People colour blind to red and also colour blind to green. Again, the physiology underlying this was not discovered for decades. (lgn) respond positively to one colour and negatively to that complementary colour. The sensation level is constant but the level is different.