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12 Cards in this Set
- Front
- Back
Sensation
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Process of sensory receptors and nervous system receive and represent stimulus energies from our environment.
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Perception
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Process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events.
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Psychophysics
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Study of relationships between the physical characteristics of stimuli, such as their intensity, and our psychological experience of them.
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Absolute Threshold
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Minimum stimulation needed to detect a particular stimulus 50% of the time.
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Subliminal
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Below one's absolute threshold of conscious awareness
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Difference Threshold
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The minimum difference between two stimuli required for detection 50% of the time. Just Noticeable Difference (JND)
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Weber's Law
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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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Sensory Adaptation
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Diminished sensitivity as a consequence of constant stimulation
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Rods
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Retinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision, when cones don't respond
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Cones
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Retinal receptors that function in daylight or well-lit conditions. Cones detect fine detail and give rise to color sensations.
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Young-Helmholtz Trichromatic Theory
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Retina has three types of color receptors and each are especially sensitive to one of three colors: red, green, blue
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Opponent-Process Theory
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As visual information leaves the receptor cells, we analyze it in terms of three sets of opponent colors: red-green, yellow-blue, white-black.
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