PSY260H1 Lecture Notes - Lecture 4: Substitution Model, Morphine, Golden Hamster

• School: UTSG
• Department: Psychology
• Course: PSY260H1
• Professor: Laura Corbit

Document Summary

Earliest explanation for the nature of the cr is pavlov"s stimulus substitution model. Cs becomes a surrogate for us & is assumed to activate similar neural circuits to us. Instead of us ur, cs us ur. Model is correct in emphasizing that the cr relates to the particular us. However, the cr is not always the same as the ur! E. g. if you pair a tone & a shock for a rat, the ur will be jumping, but the cr will be freezing. Us as a determining factor for the cr. Half the animals were hungry & half were thirsty. Lever insertion was paired w/ reward (food pellet, sugar solution or water) Responses directed at lever included orienting, licking, biting & sni ng. The results showed the hungry group that got sugar solution licked the lever & the hungry group that got pellets bit the lever.