PSYB51H3 : chapter summary from 6-11 and short answer questions with answers!

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19 Jul 2011
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Reconstructing a three-dimensional world from two, non-euclidean, curved, two- dimensional retinal images is one basic problem faced by the brain: having two eyes has a number of advantages, some of which have to do with depth perception. However, it is important to remember that it is possible to reconstruct the three-dimensional world from a single two-dimensional image. Two eyes have other advantages over just one: expanding the visual field, permitting binocular summation, and providing redundancy if one eye is damaged: a number of monocular cues provide information about three-dimensional space. These differences, known as binocular disparities, give rise to stereoscopic depth perception: random dot stereograms show that you don"t need to know what you are seeing before you see it in stereoscopic depth. Some neurons respond to a wide range of depths (e. g. , stimuli beyond the current distance of fixation).