M14_16S&P-1 - MODULES 14 & 16: SENSATION AND...

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SENSATION I. Definitions a. Sensation—Sensory receptors and nervous energy b. Perception—organizing and interpreting sensory information II. How do we make sense of stimuli that we sense? a. Bottom-Up Processing—analysis that begins with the sense receptors and works up to the brain’s integration of sensory information b. Top-Down Processing—information processing guided by higher-level mental processes c. Hall of Illusions : This is not in the lecture, but there are some good illusions at this link Ernst Weber, fechner- major players in psycho physics; disc. a number of patterns of threshols III. Sensory and perceptual processes work together to help us sort out complex processes IV. Thresholds a. How much stimulation does it take for us to detect something? b. Absolute Threshold—minimum stimulation needed to detect a particular stimulus 50% of the time c. Difference Threshold—minimum difference between two stimuli required to detect 50% of the time VISUAL PERCEPTION I. The eye and retina a. Axons of the optic nerve b. Ganglion cells
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M14_16S&P-1 - MODULES 14 & 16: SENSATION AND...

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