10.31 - move with the figure Size constancy-because we can...

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10/31/07 How do we judge depth and distance? 1. Primary cues (Physical) -Accommodation -If you look at a far object, the lens is thin -as the object gets closer, the lens bulges significantly -Convergence -Retinal Disparity -each eye sees a separate image -inter-ocular distance: 2.5 inches 2. Secondary (Psychological) -linear perspective -converging parallel lines -aerial haze/smog -as areas get hazier, they appear farther away -relative size -objects that are the same size but at different distances away appear farther -familiar size -objects that we know to be a certain size are good cues of size -interpositional cue -demonstrates what is in front of the other -patterns of light and shade -assume that lighting comes from above -texture gradients -textures give a feeling of depth from spacing -relative motion -objects closer seem to move quickly, but objects in the distance seem to
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Unformatted text preview: move with the figure Size constancy-because we can judge depth and distance, we perceive the seize of an object as constant, even though its retinal image changes dramatically as distance varies-hand to face, people in distance-children under 6 don’t maintain size constancy Nature vs. Nurture in Perception-The Nativist position-Immanuel Kant (1724-1804)-perception and all its components is inborn-The Empiricist position-John Locke (1632-1704)-perception and all its components is learned-William Molyneux (1690)-The “grand experiment”-cubes and spheres-Evidence for Nativism 1. The Visual Cliff Experiments-test 6-14 month infants on a fake cliff-infants did not cross the visual cliff-is depth perception inborn or die the infants learn something in their 1 st 6 months-test on 4 month kittens raised in the dark...
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