PS261 Chapter Notes - Chapter 4: Classical Conditioning, Psychoactive Drug, Drug Tolerance

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6 Feb 2013
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Cs does not elicit cr initially, does so after being associated with us. Us is able to elicit target response from onset without any special training. Definitions were stated in terms of elicitation of the response to be conditioned. Identifying potential cs and us requires comparing resposes elicited by each stimulus before conditioning. Event may serve as cs relative to one stimulus and a us to another: novelty of conditioned and unconditioned stimuli. Latent- inhibition effect / cs-preexposure effect if stimulus is highly familiar, will not be as readily associated with cs as novel stimuli. Involve two phases: subjects first given repeated presentations of cs by itself. Preexposure phase because it comes before pavlovian conditioning trials. After preexposure, cs paired with us using conventional classical conditioning procedures. Subjects slower to acquire responding because of cs preexposure: disrupts or inhibits learning. Similar to habituation: both serve to limit processing and attention to stimuli presented by themselves and therefore inconsequential.

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