Sensation and Perception

Sensation and Perception - Sensation and Perception -...

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Sensation and Perception - “Nothing is in the mind that did not first pass through the senses.” – Aristotle - Sensation – stimulation of sense organs (Passive, Physiological) - Perception – selection, organization, and interpretation of sensory input (Active, Cognitive) - Transduction – conversion by our sensory receptors of physical energies from our environment into neural events sent to the brain Psychophysical Relationship Physical Stimulus (Transduction) Sensory Experience - Not all physical stimuli result in sensory experience Ineffective Stimuli Stimulus Intensity Effective Stimuli - Line of demarcation that separates effective stimuli and ineffective stimuli is a Threshold Absolute Threshold (Absolute Limen) - The minimum intensity of a stimulus that will cause a perception to occur (Weber) - Supraliminal – Above the Limen (Threshold) - Subliminal – Below the Limen (Threshold) Difference Threshold (Difference Limen) - The smallest degree of change in a stimulus which is detected by the subject (JND, or Just Noticeable Difference) - JND is defined as when the subject can correctly distinguish a difference 75% of
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This note was uploaded on 04/09/2008 for the course PSYC 1101 taught by Professor Hovancik during the Fall '07 term at Seton Hall.

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Sensation and Perception - Sensation and Perception -...

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