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How do we maintain a stable perceptual world?

How do we maintain a stable perceptual world?. Distal vs . Proximal Stimulus Unconscious inference vs. higher-order patterns in the stimulus Lightness Constancy Shape Constancy Size Constancy. Sensory physiology. Physiological Response. Psychophysics. Physiological psychology.

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How do we maintain a stable perceptual world?

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  1. How do we maintain a stable perceptual world? • Distal vs. Proximal Stimulus • Unconscious inference vs. higher-order patterns in the stimulus • Lightness Constancy • Shape Constancy • Size Constancy

  2. Sensory physiology Physiological Response Psychophysics Physiological psychology Sensory Experience creativity memory Perception motivation learning attention Physical Stimulus Physical Stimulus Sensory Experience

  3. Lightness constancy One’s judgment of an object’s lightness remains constant under varying levels of illumination. Shape constancy One’s judgment of an object’s shape remains constant at varying viewing angles. Size constancy One’s judgment of an object’s size remains constant at varying distances.

  4. Lightness constancy judgments are characteristically based on the albedo: Reflected light (luminosity) Albedo = Incident light (illumination)

  5. The issue of shape constancy…

  6. The issue of shape constancy…

  7. Cues for distance or depth (depth perception) Binocular cues Monocular cues

  8. Binocular cues Convergence (oculomotor)* Retinal disparity (See Gleitman, p. 205) *…involves kinesthetic feedback

  9. (far) (near) Convergence as a binocular depth cue: (The role of kinesthetic feedback)

  10. Non-motion Motion Motion parallax Optic flow Accommodation (oculomotor)* *…involves kinesthetic feedback 2. Monocular cues Pictorial (static) cues Interposition Texture gradients Light and shadow Linear perspective Aerial perspective Horizon

  11. Interposition (occlusion)

  12. Light and shadow as a monocular depth cue

  13. Linear perspective

  14. (Appears closer) (Appears farther) (Appears farther) (Appears closer)

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