 | Term | Definition |
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Sensation |
the stimulation of sensory receptors and the transmission of sensory information to the central nervous system (the spinal cord and the brain). |
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Perception |
the psychological process through which we interpret the sensory stimulation |
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Absolute Threshold |
the weakest amount of a stimulus that can be sensed |
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Difference threshold |
the minimum amount of difference that can be detected between two stimuli |
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signal detection theory |
a method of distinguishing sensory stimuli that takes into account not only their strengths but also such elements as the setting, your physical state, your mood, and your attitudes |
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sensory adaptation |
the process by which we become more sensitive to weak stimuli and less sensitive to unchanging stimuli |
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Pupils |
sensitive to light and emotions |
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Lens |
adjusts to the distance of objects by changing its thickness |
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Retina |
sensitive surface in the eye that acts like the film in a camera, consists of neurons called photoreceptors |
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Blind Spot |
when light hits the point where the optic nerve leaves the eye, eye registers nothing because that area lacks photorececptors |
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rods and cones |
two types of photoreceptors |
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rods |
sensitive only to the brightness of light |
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cones |
provide color vision |
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dark adaptation |
when you enter a setting with lower lighting, and your eyes adapt |
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adaptation to bright light |
happens much more quickly than adaptation to the dark |
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visual acuity |
determined by the ability to see visual details (in normal light) |
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humans |
do humans see more color, or do dogs and cats? |
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Blue, Green, Red |
Color T.V pixles are... |
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complementary color |
the afterimage of a color is its |
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cones |
people who are color blind (or partially color blind) lack this, or have this but it malfunctions |
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