L19 Perception

L19 Perception - • Shape Constancy – If a solid object...

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Perception We are not in direct contact with the external world. What we do is pick up cues as to what is out there and form an internal model. That model can be formed from degraded cues. We can entertain multiple internal models. Sometimes that internal model is wrong.
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Perception We can form an internal model from pretty subtle cues.
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Perception We can entertain more than one internal model and these can compete with one another.
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Perception Sometimes our internal model is wrong.
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Perception: Principles of Organization Gestalt School similarity proximity good figure closur
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Pitting Good Figure Against Proximity
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Perception: Principles of Organization Perceptual Constancies: We learn early in life to make certain assumptions, e.g. solid objects do not capriciously change shape, size, etc. Size Constancy – If a solid object is getting larger, it must be getting closer to me.
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Unformatted text preview: • Shape Constancy – If a solid object is changing shape, either it is changing orientation or I am. • Brightness Constancy - If an object is changing brightness, it is changing location with respect to a light source. • Color Constancy – If an object is changing color, the color of a light source has probably Cues of Depth Perception Monocular Relative Size Interposition light retina lens muscles Focus (20 ft.) close far faster slower Relative Motion Cues of Depth Perception Binocular Retinal Disparity wall thumb left eye right eye left eye right eye Vergence (20 ft.) Muscles steering eyeball Is perception built-in or learned? Built-in (nature) • Newborn babies’ preferences • Single-cell electrode data • Visual cliff Learned (nurture) • Inverting lenses • Sight recovery of the blind...
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This note was uploaded on 10/28/2011 for the course PSY 200 taught by Professor Craig during the Spring '08 term at N.C. State.

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L19 Perception - • Shape Constancy – If a solid object...

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