35101006 - 9/7/08 Learning and Behavior Psychology 351...

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Unformatted text preview: 9/7/08 Learning and Behavior Psychology 351 Thomas G. Brown, Ph.D. Last Class   Imprinting vs. Association Learning   Tropisms   Reflexes   Habituation   Sensitization Rats   Questions   Weight fluctuations   Time of day   Holding cage   Shavings   Sink   General cleanliness   Questions 1 9/7/08 Elicited Behavior   Reflexes are involuntary, adaptive behavior. learned behaviors involve a modification of these inherited response tendencies.   Reflexes can be modified by classical conditioning.   Most Classical Conditioning   Ivan P. Pavlov   1849-1936   Three “careers” –  Physiology –  Conditioning –  Neurosis therapy   Sechenov The Dog 2 9/7/08 The Dog   Bummer The Paradigm Elicits UCS UCR Elicits CR CS Terms Unconditional Stimulus –  Any potent or massive stimulus which evokes a regular and measurable response   Unconditional Response –  A regular and measurable response elicited by a UCS –  Orienting Reaction   Conditional Stimulus –  Originally neutral stimulus preceding the UCS   Conditional Response –  Learned response resembling the UCR   3 9/7/08 Elicitation UCS Elicits UCR CR CS   Unconditional Response (reflex)   Orienting Reaction   Intensity of stimulus   Are the OR and the UCR always the same response? Higher Order Conditioning   CS1 imitates UCS for CS2   Dentist illustration Stimulus Asynchronism UCS CS Forward 4 9/7/08 Specifying the CR   How do we get the UCR out of the way? Method   Anticipation –  O.5 second optimum –  GSR - 2 second optimum   Test Trial Method –  Extinction trial Pseudoconditioning   Random, voluntary (non-reflexive) responses occurring during conditioning   Wickens (1939) –  Difference between CR and voluntary responses   1 - CS (buzzer) paired with mild shock to forefinger - withdraw finger when buzzer comes on   3 - like 2 but threatened with shock if too slow   2   Groups   Group 2 and 3 slowed little conditioning 1 persistent CRs Pseudoconditioning   Sometimes inflation of CR strength, usually temporary, that is attributable to factors other than CS-UCS pairing   Wickens and Wickens (1942) Tone Onset Gradual Sudden 3 of 18 Gradual Light Onset Escape from Shock Sudden 15 of 18 5 9/7/08 Stimulus Asynchronism UCS CS Forward CS Trace CS Delayed CS Simultaneous CS Backward Other Basic Phenomenon   Temporal Conditioning –  Every x seconds UCS –  What is the CS? 6 ...
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