PSYCO104 Lecture Notes - Lecture 2: Complementary Colors, Blacklight, Neural Adaptation

• School: University of Alberta
• Department: Psychology
• Course: PSYCO104
• Professor: Kathryn Chaffee

Document Summary

3 properties of light influences perception of color. Subtractive - certain wavelengths absorbed (mixing paint, more and more colors create a black light, etc) One pixel giving out pure red light, one pixel gives out pure , these altogether give white) 3 types of color receptors (cones) - differing sensitivities to diff. wavelengths. Correspond to additive receptors for red, green, blue. Colorblind: 3 types - red, green, or blue insensitive dichromatism. Pairs of colors create grey neutral tone when mixed. Afterimage - visual image persisting after stimulus is received. When stimulus is removed, opposite image/color is seen. Color perception depends on opposite/antagonistic responses to 3 color pairs: 3 types of cones - each type most sensitive to diff band of wavelengths. Opponent processes occur, but not in cones. Motion parallax - images of objects in varying distances move differently across retina. Pictorial depth cues - clues with distance given in a flat picture (paintings, photographs, drawings, etc)