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Psychology of Learning EXP4404

Psychology of Learning EXP4404. Chapter 3: Pavlovian (Classical) Conditioning Dr. Steve. Topics Covered. Classical Conditioning Paradigm CS, US, CR, UR Measuring CC Compound Stimulus Effects Variables Affecting Conditioning Theories of Classical Conditioning

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Psychology of Learning EXP4404

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  1. Psychology of LearningEXP4404 Chapter 3: Pavlovian (Classical) Conditioning Dr. Steve

  2. Topics Covered • Classical Conditioning Paradigm • CS, US, CR, UR • Measuring CC • Compound Stimulus Effects • Variables Affecting Conditioning • Theories of Classical Conditioning • Stimulus Substitution (Pavlov) • Rescorla-Wagner Model

  3. Classical Conditioning • “Psychic Secretions” • Unconditioned Reflexes • Conditioned Reflexes

  4. Classical Conditioning Paradigm • Classical (Pavlovian or Respondent) Conditioning http://www.youtube.com/watch?v=hhqumfpxuzI

  5. Classical Conditioning Paradigm • Extinction • Spontaneous Recovery

  6. Classical Conditioning Paradigm • CC Examples

  7. Classical Conditioning Paradigms CS Delayed US CS Trace US CS Simultaneous US CS Backward US Temporal CS: Time Interval US time

  8. Classical Conditioning Paradigms • CR vs. UR – How do we know CR is not a reflexive action to CS? • Inhibition of Delay

  9. Measuring Conditioning • Response Latency • Test Trials • CR Intensity • Suppression Ratio

  10. Compound Stimulus Effects • Higher-Order Conditioning

  11. Compound Stimulus Effects • Sensory Preconditioning

  12. Compound Stimulus Effects • Overshadowing

  13. Compound Stimulus Effects • Kamin’s Blocking Effect

  14. Variables Affecting Conditioning • Previous Exposure to CS & US • Latent Inhibition • Habituation • Intensity of US • One-Trial Learning • Duration of US • Intensity & Duration of CS

  15. Variables Affecting Conditioning • CS-US Interval (1/2 sec usually optimum) • Delayed • Trace • Simultaneous • Backward • Temporal • Intertrial Interval • Practice

  16. Variables Affecting Conditioning • Novelty of CS & US • Similarity of CS to US • Subject Age

  17. Classical Conditioning Theories • Stimulus Substitution (Pavlov) • Contiguity

  18. Classical Conditioning Theories • Rescorla-Wagner Model • contingency

  19. Classical Conditioning Theories Rescorla-Wagner Model : • ΔVn = c(λ – Vn-1) • ΔVn = Change in learning since last trial • c = How much of a complete association between CS & US is subject capable of learning on a given trial (0 – 1) • λ = Total amount learnable – estimated by measuring max performance of highly trained subjects (depends on intensity of US) • Vn-1 = Amount of learning that previously occurred to the US Trial

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