Colwill and Rescorla studies

• Phase 1: R1(Bar press) --> SR1 (salty chow)

and R2(Chain pull) --> SR2 (tasty chow)

• Phase 2: Feed with SR1 (salty chow) outside the experimental chamber.

• Test: Pulls chain.

• Analogous results were found for SR devaluation. Clearly, the SR is involved in the learning process.

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