Post on 31-Dec-2015
Psychology of LearningEXP4404
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
Stimulus Substitution (Pavlov) Rescorla-Wagner Model
“Psychic Secretions” Unconditioned Reflexes Conditioned Reflexes
Classical Conditioning
Classical Conditioning Paradigm
Classical (Pavlovian or Respondent) Conditioning
http://www.youtube.com/watch?v=hhqumfpxuzI
Extinction Spontaneous Recovery
Classical Conditioning Paradigm
Classical Conditioning Paradigm
CC Examples
Classical Conditioning Paradigms
DelayedCS
US
TraceCS
US
CS
USSimultaneous
Backward CS
US
TemporalUS
CS: Time Interval
time
CR vs. UR – How do we know CR is not a reflexive action to CS?
Inhibition of Delay
Classical Conditioning Paradigms
Measuring Conditioning
Response Latency Test Trials CR Intensity Suppression Ratio
Compound Stimulus Effects
Higher-Order Conditioning
Sensory Preconditioning
Compound Stimulus Effects
Overshadowing
Compound Stimulus Effects
Kamin’s Blocking Effect
Compound Stimulus Effects
Variables Affecting Conditioning
Previous Exposure to CS & US Latent Inhibition Habituation
Intensity of US One-Trial Learning
Duration of US Intensity & Duration of CS
CS-US Interval (1/2 sec usually optimum) Delayed Trace Simultaneous Backward Temporal
Intertrial Interval Practice
Variables Affecting Conditioning
Novelty of CS & US Similarity of CS to US Subject Age
Variables Affecting Conditioning
Classical Conditioning Theories
Stimulus Substitution (Pavlov) Contiguity
Rescorla-Wagner Model contingency
Classical Conditioning Theories
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