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Modules 16-18

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
absolute threshold   show
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bottom-up processing   show
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show failing to notice changes in the environment  
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difference threshold   show
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show failing to see visible objects when our attention is directed elsewhere  
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perception   show
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selective attention   show
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sensation   show
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show diminished sensitivity as a consequence of constant stimulation  
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show a theory predicting how and when we detect the presence of a faint stimulus (signal) amid background stimulation (noise).  
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show below one's absolute threshold for conscious awareness  
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top-down processing   show
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transduction   show
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show the principle that, to be perceived as different, two stimuli must differ by a constant minimum percentage (rather than a constant amount)  
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accommodation   show
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blind spot   show
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show retinal receptor cells that are concentrated near the center of the center of the retina and that function in daylight or in well-lit conditions. Detect fine detail and give rise to color sensations  
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feature detectors   show
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show the central focal point in the retina, around which the eye's cones cluster  
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show the dimension of color that is determined by the wavelength of light; what we know as the color names blue, green, and so forth  
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intensity   show
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show a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening  
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show the transparent structure behind the pupil that changes shape to help focus images on the retina  
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opponent-process theory   show
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show the nerve that carries neural impulses from the eye to the brain  
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parallel processing   show
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show the adjustable opening in the center of the eye through which light enters  
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retina   show
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rods   show
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wavelength   show
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show the theory that retina contains three different color receptors-one most sensitive to red, one to green, one to blue--which, when stimulated in combination, can produce the perception of any color  
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extrasensory perception (esp)   show
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show a mental predisposition to perceive one thing and not other  
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Created by: margaret_05
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