WT 4e, chap 06-Sensation & perception

WT 4e, chap 06-Sensation & perception - Sensation and...

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Unformatted text preview: Sensation and Perception chapter 6 Overview Our sensational senses Vision Hearing Other senses Perceptual powers Puzzles of perception chapter 6 Definitions Sensation The detection of physical energy emitted or reflected by physical objects Occurs when energy in the external environment or the body stimulates receptors in the sense organs Perception The process by which the brain organizes and interprets sensory information chapter 6 Ambiguous figure Colored surface can be either the outside front surface or the inside back surface. But not simultaneously both The brain can interpret the ambiguous cues in two different ways. chapter 6 Riddle of separate sensations Sense receptors Specialized cells that convert physical energy into electrical energy that can be transmitted as nerve impulses to the brain chapter 6 Sensation and perception chapter 6 Specific nerve energies Different sensory modalities exist because signals received by the sense organs stimulate different nerve pathways leading to different areas of the brain. Synesthesia A condition in which stimulation of one sense also evokes another chapter 6 Absolute threshold The smallest quantity of physical energy that can be reliably detected by an observer chapter 6 Absolute thresholds Vision A single candle flame from 30 miles on a clear night Hearing The tick of a watch from 20 feet in total quiet Smell One drop of perfume in a 6-room apartment Touch The wing of a bee on the cheek, dropped from 1 cm Taste One teaspoon of sugar in 2 gallons of water chapter 6 Difference threshold The smallest difference in stimulation that can be reliably detected by an observer when two stimuli are compared Also called the Just Noticeable Difference (JND) chapter 6 Signal-detection theory A psychophysical theory that divides the detection of a sensory signal into a sensory process and a decision process chapter 6 Sensory adaptation and deprivation Adaptation The reduction or disappearance of sensory responsiveness...
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This note was uploaded on 09/28/2011 for the course PSYC 101 taught by Professor Cusaac during the Fall '08 term at South Carolina.

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WT 4e, chap 06-Sensation & perception - Sensation and...

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