CAS PS 101 Lecture Notes - Lecture 13: Binocular Disparity, Afterimage, Retina

• School: Boston University
• Department: Psychological & Brain Sciences
• Course: CAS PS 101
• Professor: Ben Wormwood

Document Summary

Cells are excited by blue and inhibited by yellow. Cells are excited by red and inhibited by green. Cells are excited by white and inhibited by black: ex. the more you adapt to one color, the more sensitive you are to its opponent. The photoreceptors do not compete with each other directly. When one type of cone is stimulated too long, its response weakens to adapt. Opponent cone signal grows in strength in absence of inhibition. So when you look away, the opponent cones create an after-image. Binocular disparity: difference in the retinal images of the two eyes that provides information about depth: left eye sees objects displaced to the right; right eye sees objects displaced to the left. Frequency: corresponds to our perception of pitch (how close to each other the waves are: higher frequency high-pitched sound, lower frequency low-pitched sound. Amplitude: corresponds to our perception of sound (how high the waves are)