Module 6 Notes Psych 201

Module 6 Notes Psych 201 - Module 6 Notes Psych 201 A....

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Module 6 Notes Psych 201 A. Perceptual Thresholds a. Threshold: a point above which a stimulus is perceived and below which is not perceived. Determines when we will first be aware of a stimulus. b. Gustav Fechner: the smallest amount of stimulus energy that can be observed or experienced. c. Absolute Threshold: the intensity level of a stimulus so that a person will have a 50% chance of detecting it. d. Subliminal Stimulus: an intensity that gives a person less than a 50% chance of detecting the stimulus. e. Weber: developed concept of just noticeable difference: i. The smallest increase or decrease in the intensity of a stimulus that a person is able to detect. ii. Weber’s Law: states that the increase in intensity of a stimulus needed to produce a just noticeable difference grows in proportion to the intensity of the initial stimulus. B. Sensation vs. Perception a. Sensation: our first awareness of some outside stimulus. A outside stimulus activates sensory receptors, which in turn make electrical signals that are transformed into meaningless bits of info. b. Perception: the experience we have after our brain assembles and combines thousands of individual, meaningless sensations into a meaningful
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This note was uploaded on 11/13/2011 for the course PSYCH 201 taught by Professor Jasonwilliams during the Spring '11 term at Cal Poly.

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Module 6 Notes Psych 201 - Module 6 Notes Psych 201 A....

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