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Part 1
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Part 1: Sensory Processing Vision Part 2: Other Sensory Systems
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Sensation Vs. Perception
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Psychophysics Absolute threshold Just Noticeable Difference (JND) –Weber’s Law ∆I/I
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Transduction The process by which sense organs convert energy from the environmental events into neural activity Receptors: Photoreceptors Hair cells Taste receptor cells Cilia
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The Visible Spectrum
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The Eye Photoreceptor Cells: –Rods –Cones
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Color Vision Wavelength 3 Types of Cones: –Blue (short) –Green (medium) –Red (long)
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Theories of Color Vision Young-Helmholtz Trichromatic Theory Opponent Process Theory –Negative Afterimages
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Defects in Color Vision Red/Green Color Blindness Blue/Yellow Color Blindness Cerebral Achromatopsia
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Perception of Form Primitive Features Figure and Background (Ground) Gestalt Psychology and Perceptual Grouping
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Perception of Form Law of Proximity:
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Perception of Form Law of Similarity: X X X O O O X X X O O O X X X XXXXXXXXXXXXXXXOOOOOOOOOOOOOOOXXXXXXXXXXXXXXXOOOOOOOOOOOOOOO
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Perception of Form Law of Continuity:
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Perception of Form Law of Closure:
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Perception of Form Law of Pragnanz (Good Figure):
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Types of Processing Top Down Processing Bottom Up Processing
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Depth Perception Binocular Cues Monocular Cues
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Binocular Cues Retinal Disparity Convergence
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Monocular Cues Interposition Linear Perspective Relative Size Texture Gradient Relative Motion –Motion Parallax
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Some Fun Visual Illusions
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