Lec 09 - Sensation & Perception

Lec 09 - Sensation & Perception - Sensation Perception...

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Sensation & Perception
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Sensation Sensation Process by which sensory receptors and nervous system receive and represent stimuli Perception Process of organizing and interpreting sensory information
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Sensation Processing Bottom-Up Processing analysis that begins with the sense receptors and works up to the brain’s integration of sensory information Top-Down Processing information processing guided by higher-level mental processes as when we construct perceptions drawing on our experience and expectations
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Sensation Signal Detection Theory Detecting the signal from the noise (attenuation) Absolute Threshold Minimum stimulation needed to detect a particular stimulus 50% of the time. Subliminal Stimulation Any stimulus below absolute threshold
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Difference Threshold (Webber’s Law) Just Noticeable Difference (JND) Difference threshold is a constant proportion of the stimulus (2% for weight, .3% for sound, 8%
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Lec 09 - Sensation & Perception - Sensation Perception...

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