PSYC10003 Lecture Notes - Lecture 1: Classical Conditioning, Conditioned Taste Aversion, Chemotherapy

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14 Jun 2018

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Lecture 1

Classical Conditioning

Basic principles

• UCR and CR are the same behaviour, they are distinguished by the stimulus that

precede d them

• Conditioning is strengthened by

o Frequent pairings of CS and UCS

o Timing – CS presented immediately prior or concurrently with UCS to make

CS predictive of UCS

Phenomena in CC

• Extinction – gradually weakening CR – occurs when CS is repeatedly presented

without the UCS

• Spontaneous recovery – reappearance of a previously extinguished response

o E.g. Palos dogs allowed a few hours to rest, and after extinction the CS

would again elicit CR

• Rapid reacquisition – once extinction occurred, re-learning is substantially faster

when a second acquisition phase is introduced

• Shows that extinction is not an unlearning of the CR, but a learned inhibition of

responding

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