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Test #2 Notes - Chapter3: 21:43 conditioned/ procedure=...

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Chapter 3: Classical Conditioning 21:43 -“Psychic Secretions”- pavlov took saliva via the ear into the brain -conditioned/unconditioned but really pavlov called it conditionAL and uncondtionAL -procedure= present 2 stimuli close together in time CS -> US -result= one stimulus (CS) comes to control a response it previously did not (CR) -Pavlov= see notes -Sign tracking or autoshaping= (Brown + Jankins, 1968)= pigeons in an oparant chamber sign tracking= animals will approach stimuli that predict food (stimuli that “signal” food) -Hearst + Jankins (1974) -Fear Conditioning=  operant chamber, rats make animal afraid of stimulus Procedure= CS --------> US  ---------------------------- UR     Tone(1/2mins)        shock to feet (grid shock)     jump around Rats --- fear= freeze
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Results= CS -----  CR          Tone           freezing NOT moving Suppression ratio= measures fear indirectly 1. Create a baseline operant response (for food reward) lever press for food               < ^ OPERANT COND. Operant positive reward 2. Stabalize this baseline (VI schedule) 3. Introduce classical fear conditioning= CS -------  US Tone          shock Supression ratio= #of responses during CS/  # of responses during CS + # responses in previous or pre-CS interval pre-CS interval is the same length of time as the CS interval What if rat is totaling freezing during CS (total fear)? Supp. Ratio=    0/ 0+X=  0/X= 0= max fear No fear, no conditioning= Supp. Ratio= X/ X + X = X/2X=  ½ = .5 .50 = no fear!
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Inhibitory Conditioning  21:43 Readings: 19-28 29-33 intro plus 31-33 Next Tuesday review for test, test on Wednesday Inhibitory Conditioning= creating a CS (i.e tone) as a signal for the absence of the US.
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