Sensation and perception

Sensation and - Observations of the gate control theory in action The shower accident The interpretation of sensory information Sensory threshold

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Sensation and perception Sensation- process of converting raw energy from environment into a pattern of response by nervous system. Perception- process of interpreting sensed info color is perceived in terms of a system of paired opposites. Color constancy- tendency of an object to appear nearly the same color under a variety of lighting conditions. Non visual senses: Hearing Sound waves Vibrations in air/other medium Frequency ~ pitch Amplitude ~ loudness Skin senses Several receptors: Touch vibration stretch Warmth/cold Pain Pain: Receptors are bare nerves Gate control theory Melzack and Wall Spinal gate Medical management of pain Substance P Drugs and endorphins Multimodal pain management
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Unformatted text preview: Observations of the gate control theory in action: The shower accident The interpretation of sensory information Sensory threshold: intensity at which one can detects S 50% of the time Varies in individuals and situation Bottom up processing Initiated by S input Feature detectors Top down processing Guided by knowledge, expectation, or belief Gestalt, earlier experience Focuses on the overall pattern: top down To perceive an object (figure), it must be distinguished from the background (ground) Reversible figures Stimulus is static; perception is not Optical illusion Misperceived interpretation of a stimulus...
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This note was uploaded on 09/27/2010 for the course PGY 166214 taught by Professor Hudson during the Fall '10 term at SUNY Buffalo.

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Sensation and - Observations of the gate control theory in action The shower accident The interpretation of sensory information Sensory threshold

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