Lect+7.VisualPerception.6slides+per+page

Lect+7.VisualPerception.6slides+per+page - 1 Lecture 7...

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Unformatted text preview: 4/26/2010 1 Lecture 7: Sensation & Perception II Making Sense of Our Visual World PSC1 Spring 2010, Dr. Liat Sayfan Outline c Vision c Attention processes c Principles of perception c Depth perception c Bottom-up and Top-down processes c Understanding perceptual illusions Properties of light waves: c Length => perceived color (hue) c Amplitude => brightness c Purity => saturation (richness) length Amplitude purity The Human Eye The Retina 4/26/2010 2 Visual Pathways The Visual Cortex c Feature detectors c Neurons that are activated by specific visual stimulus c Fusiform gyrus c face recognition c Prosopagnosia c face blindness Theories of Color Vision Opponent-process theory (Hering) Trichromatic theory (Helmholtz-Young) Ewald Hering (1834-1918) Theories of Color Vision: • Three types of color receptors • Pattern of activation determines the perceived color Trichromatic theory (Helmholtz-Young) Theories of Color Vision c Opponent-process theory (Hering) c Black/white c Red/green c Blue/yellow Attention c Process of directing and focusing psychological resources to enhance perception, performance, and mental experience c Hemineglect (ignore half of visual field) c Image is sensed (received by retina) c But is not perceived (no conscious awareness) 4/26/2010 3 Attention Processes Inattentional blindness Ignoring (not attending to) Information c Directing attention can be easy...
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This note was uploaded on 05/08/2010 for the course PSC PSC 001 taught by Professor Paoli during the Spring '09 term at UC Davis.

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Lect+7.VisualPerception.6slides+per+page - 1 Lecture 7...

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