PSYC 2330 Lecture Notes - Lecture 10: Nucleus Accumbens, Antipsychotic, Tegmentum
12 Dec 2015
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The subject learns that the cs will predict the us but it doesn"t. They learn to look for predictors to see when it will and when it won"t. Problems (nicholas mackintosh the mackintosh model) & (john perce & geoffrey hall . V = prediction error (when you don"t expect something and it happens: happens at the beginning of conditioning until the cs is established, v gets smaller every time you learn to predict, reduce error (= learning) Activity of dopaminergic neurons in the ventral tegmental area should increase when a well- conditioned cs is presented. Pigeons experiment: light (cs) food (us: pigeon pecks at the light auto-shaping. In autoshaping, the cs is associated with the delivery of the us. Directed behaviour sign-tracking (ie. pecking at the light trying to. Interbred goal-tracking and sign-tracking rats, creating populations of each, and then did conditioning as they went through they measured the release of dopamine in the nucleus accumbens (nac) o.
