Lecture - 10 - April 22

Lecture - 10 - April 22 - OUR SENSES - VISION...

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Unformatted text preview: OUR SENSES - VISION Photoreceptors Bipolar Cell To Brain for Interpretation The opponent- process theory suggests that opposing retinal processes ( red- green, yellow- blue, white- black ) enable color vision. Visual Information Processing - Focus on Color Vision OUR SENSES - VISION The opponent- process theory suggests that opposing retinal processes ( red- green, yellow- blue, white- black ) enable color vision. Visual Information Processing - Focus on Color Vision OUR SENSES - VISION The opponent- process theory suggests that opposing retinal processes ( red- green, yellow- blue, white- black ) enable color vision. Visual Information Processing - Focus on Color Vision QUESTION # 6 Before going to sleep one night, Jill reads her daughter, Stacey, a bedtime story. The book is Flled with pictures. In particular, there is a reoccurring picture of a character that always wears a bright purple shirt. Stacey is fascinated by this character and cant stop staring at him. When Jill Fnishes the story she abruptly closes the book and tells her daughter its time for bed. Jill then notices a look of horror on Staceys face. Jill asks, Whats wrong? Stacey replies, Theres a green monster on the wall! Assuming there isnt really a green monster on the wall, how might we explain Staceys perception? Give a step- by- step account of how Staceys perception of the green monster might have come about. Please only use words ( do not draw a diagram ) . This question ( as with all questions ) is to be answered in a maximum of one page, double- spaced , using 12 point, arial font. Stimulus Input - Sound Waves OUR SENSES - HEARING Frequency = Pitch Amplitude = Loudness Sound waves consist of compressed and expanding air molecules. The Ear - Overview OUR SENSES - HEARING Outer Ear : Collects and sends sounds to the eardrum Middle Ear : Chamber between eardrum and cochlea containing three tiny bones ( hammer, anvil, stirrup ) that concentrate the vibrations of the eardrum on the cochleas oval window Inner Ear : Innermost part of the ear, containing the cochlea The Ear - Cochlea OUR SENSES - HEARING Cochlea : Coiled, bony, fuid- Flled tube in the inner ear that transorms sound vibrations to auditory signals. Perceiving Loudness OUR SENSES - HEARING The perception of loudness derives from the number of hair cells that are activated, with louder sounds ( higher amplitude waves ) activating more hair cells than quieter sounds ( lower amplitude waves ) . Perceiving Pitch - Theories OUR SENSES - HEARING Place theory assumes we hear di f erent pitches because di f erent sound waves trigger activity at di f erent places along the cochleas basilar membrane But displacement of the basilar membrane is not Fne enough to account for our ability to discriminate between pitches ( in particular for low pitches ) !...
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This note was uploaded on 10/11/2011 for the course PSYC 1 taught by Professor Stuartantsis during the Spring '08 term at UCSD.

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Lecture - 10 - April 22 - OUR SENSES - VISION...

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