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PSYB51H3 (301)
Chapter 6

PSYB51 Detailed chapter notes (Chapter 6)

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University of Toronto Scarborough
Matthias Niemeier

Chapter 6: Space Perception and Binocular Vision - Realism a philosophical position arguing that there is a real world to sense - Positivism a philosophical position arguing that all we really have to go on is the evidence of the senses, the world may be nothing more than an elaborate hallucination Euclidean The geology of the world, so named in honor of Euclid, the ancient Greek geometer of the third century BC E. in Euclidean geometry, parallel lines remain parallel as they are extended into space, objects maintain the same size and shape as they move around in space, the internal angles of a triangle always add to the 180 and so forth - The geometry of retinal images of the world is decidedly non-Euclidean We construct the world from two non-Euclidean inputs: the two distinct retinal images - Advantages to having two eyeballs: you can lose one eye and still be able to see, and they enable you to see more of the world Our visual field is limited to about 190 from left to right, 110 of which is covered by both eyes; 60 up from the center of gaze and 80 down Binocular visual fields just a better chance to spot small, fast-moving objects - Binocular summation the combination (or summation) of signals from each eye in ways that make performance on many tasks better with both sides with either eye alone. They have provided evolutionary pressure that first moved eyes to the front of some birds and mammals face - Binocular disparity the differences between the two retinal images of the same world. Disparity a basis for vivid perception of the three dimensionality of the world that is not available with purely monocular (one-eyed) vision. - Stereopsis the ability to use binocular disparity as a cue to depth. Not a necessary condition for depth perception or space perception - Depth cues information about the third dimension (depth) of visual space. Depth cues may be monocular or binocular. - Monocular depth cue a depth cue that is available even when the world is viewed with one eye alone. - Binocular depth cue a depth cue that relies on information from both eyes. Stereopsis is the primary example in humans, but convergence and he ability of two eyes to see more of an object than one eye sees are also binocular depth cues. 1 www.notesolution.com
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