01:830:101 Lecture Notes - Lecture 19: Piggy Bank, Operant Conditioning, Frontal Lobe

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6 Jun 2018

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Module 23: Biology, Cognition, and Learning

Biological Constraints on Conditioning

▪ Scientists used to assume that basic laws of learning were similar in all animals

▪ Limits on classical conditioning

▪ Garia ad Koellig’s taste-aversion research

▪ Animals and humans seem biologically prepared to learn some associations rather than

others

▪ Conditioning is stronger when the CS is ecologically relevant

▪ Genetic predisposition to associate CS with a US that follows predictably and

immediately is adaptive

Garcia & Koelling

▪ Exposed rates to a taste, sight, or sound (CS)

▪ And then later to radiation or drugs that caused nausea (UCS)

▪ 2 findings

▪ Even if sickened hours after tasting novel flavor, rats thereafter avoided that flavor!

▪ A sickened rat develops aversion to tastes but not sights or sounds = taste aversion

▪ Humans, too, biologically prepared to learn some associations rather than others

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