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10 Cards in this Set
- Front
- Back
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Sensation
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The process by which stimulation of a sensory receptor produces neural impulses which cause the brain to "sense" (taste, hear(
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Perception
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A mental process that gives meaning to sensation (is the tomato ripe?)
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Transduction
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The sensory process that converts "energy" (light, sound waves) into neural messages
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Absolute Threschold
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The minimum amount of physical energy needed to produced a sensation (stimulus detected 50% of time)
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Difference Threshold
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the smallest physical difference between two stimuli that can be recognized as a difference (JND- just noticeable difference) Ex: TV volume
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Webers Law
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Law that says the size of a JND is porportionate to the intensity of the stimulus.
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Fechner's Law
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An increase in the pyschical size of stimuli produces smaller increases in the perceived magnitude.
S= k log R (s- Sensation, R- stimulus k- constant) |
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Steven's Power Law
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a law of magnitude estimation more accurate than Fechners.
S= kl^a (s- sensation, k- constant, l-stiumulus intensity, a- power constant) |
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Signal Detection Theory
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Ezplains how we detect "signals", sensation is a judgement the sensory system makes about the incoming situation and is based on the detector, background stimulation and the characteristics of the stimulus (8:00 AM class- coffee vs. no coffee)
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Subliminal/Supraliminal
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below the threshold/above the threshold
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