PSYCH-101 Lecture Notes - Lecture 27: Vending Machine, Slot Machine, Nucleus Accumbens
18 Sep 2020
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Behaviors conditioned using partial/intermittent reinforcement resist extinction longer than those that were conditioned under continuous reinforcement. Partial: only giving the dog a treat sometimes. Fixed: reinforcement after a given amount of time or responses. Variable: you are reinforced after an average amount of time has passed or responses have been given, reinforcement is unpredictable . Ratio: based on number of behaviors (i. e. ratio of responses to reinforcements) Intermittent/partial reinforcement resists extinction more than continuous reinforcement. Ex: broken vending machine vs. broken slot machine. Variable ratio is most resistant to extinction. Nucleus accumbens is activated during the processing of rewards. Dopamine is released when a behaviour is rewarded for the first time. Genetic variation in dopamine and dopamine circuits might explain individual differences. Pairing of cs and ucs occurs before behavior. Learning can be both classical and operant conditioning. Even without reward, rats explore and learn about the maze. Storage: store the dvd in a drawer.
