C&L4

C&L4 - :Foundations January26,2012...

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Conditioning and Learning Classical Conditioning:  Foundations January 26, 2012 © John M. Ackroff 2012
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© John M. Ackroff 2012  Classical Conditioning We learn about cause and effect  relationships. In Classical Conditioning, we try to  understand what influences how we  learn these associations.
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© John M. Ackroff 2012  Pavlov  Used stomach fistula to collect gastric juices Dogs secrete gastric juices When they see food When they see the person who feeds them  Not much interest in these observations per  se . They become interesting when Pavlov realized he  could use this as a tool to learn more about the  nervous system.
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© John M. Ackroff 2012  Vul’fson and Snarskii Studied salivary response Dry food, wet food, sour liquids, sand After several exposures, sight -> salivation Both visual and orosensory (taste and  texture) cues Object learning:  association of one feature  (visual appearance) of an object with another  feature (orosensory properties).
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© John M. Ackroff 2012  The Classical Conditioning  Paradigm Initially One stimulus that doesn’t elicit salivation (tone or  light) One that does (food) Unconditioned stimulus and response Don’t depend on prior training Conditioned stimulus and response Only after training CS, CR, U[C]S, U[C]R
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© John M. Ackroff 2012  Experimental Work Rats and pigeons instead of dogs Some use of other animals Some human work
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© John M. Ackroff 2012  Fear Conditioning Watson and Rayner with Little Albert Conditioned fear to rat Generalized to rabbit, fur coat, Santa  mask
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© John M. Ackroff 2012  Fear Conditioning in  Animals footshock  freezing  Only breathing – no sniffing, whisker  movement Conditioned suppression– learning to  inhibit responding
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© John M. Ackroff 2012  Lick Suppression  Paradigm Condition fear to some CS
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C&L4 - :Foundations January26,2012...

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