Pavlovian Conditioning: Mechanisms and Theories

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Presentation transcript:

Pavlovian Conditioning: Mechanisms and Theories Chapter 6 Pavlovian Conditioning: Mechanisms and Theories What is Learned in Pavlovian Conditioning? S-R versus S-S learning How are Pavlovian Associations Learned? The Rescorla-Wagner model Attentional models of conditioning Temporal factors and conditioned responding The comparator hypothesis

Rescorla-Wagner Model Conditioning is a function of US effectiveness. US surprisingness determines its effectiveness. US surprise calculated based on all of the predictive cues in the situation. Quantitative model.

Rescorla-Wagner Model Learning as error correction. Error is difference between what is predicted and what occurs. Error calculation:

Attentional Models Pearce & Hall: Surprisingness of US on trial N increases attention to the CS on trial N+1. –Prospective effect –Cannot explain 1-trial blocking

Comparator Hypothesis Theory of performance, not learning. Assumes only excitatory associations Predicts that changes in the value of the “comparator” stimulus will change level of responding Conditioned inhibition is lost with extinction of excitatory comparator.