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Chapter 5: Classical Conditioning: Underlying Processes S-S vs S-R Learning Theoretical Explanations http://www.youtube.com/watch?v=w3sgR12ZSh8
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Two Models of Learning S-R model: NSUSUR CS UR
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S-R Learning Second-Order Conditioning : : After extinction of light No bar pressing
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Theoretical Explanations Stimulus-Substitution Theory CS acts as a substitute for US “food center”“salivation center” “light center”
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Sign Tracking
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Situation where Stimulus-Substitution does not explain events Jump (UR)Freeze (CR)
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Theoretical Explanations Preparatory-Response Theory CS tells organism to get ready for US
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Two Models of Learning S-S model: NSUSUR CS US
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S-S Learning Blocking US and CS associated
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S-S Learning US Revaluation : US and CS associated
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S-R model S-S model Dog : Bite Fear NS US UR Dog : Bite Fear NS US UR Two Models of Learning
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Homeostatic Systems
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Theoretical Explanations Preparatory-Response Theory Compensatory-Response Model Unconditioned response to shock: Shock increased heart rate US UR First few pairings: Tone:Shock increased heart rate NS US UR Tone increased heart rate CS CR After repeated pairings: Tone:Shock increased heart rate NS US UR Tone decreased heart rate CS CR
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Drug Addiction Heroin-related cues: Heroin Decreased blood pressure NS US UR Heroin-related cues Increased blood pressure CS UR Heroin Decreased blood pressure Increased blood pressure a-process b-process US UR/US UR
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Drug Addiction Heroin-related cues: Relaxing effect Tension a-process b-process NS US UR Heroin-related cues tension CS CR
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Drug Tolerance
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Theories: What causes the learning? Stimulus-Substitution Theory CS acts as a substitute for US Preparatory-Response Theory CS tells organism to get ready for US Compensatory-Response Model
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Rescorla-Wagner Model Proposes that the US has a limited amount of associative value, and that this value is distributed among the available CSs
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Examples 1. Tone (V=0): Food (Max=10) 10 drops of saliva Tone (V=10) 10 drops of saliva
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Examples 2. [Loud Tone + Dim Light] (V=0) : Food (Max=10) 10 drops of saliva Loud Tone (V=9) 9 drops of saliva Dim Light (V=1) 1 drops of saliva
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Examples 3. [Tone (V=10) + Light (V=0)] : Food (Max=10) 10 drops of saliva Tone (V=10) 10 drops of saliva Light (V=0) 0 drops of saliva
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