PS261 Lecture 8: Chapter 10 - Learning.docx
Document Summary
Avoidance behavior: procedures: discriminated (signaled avoidance, avoidance trial: response during cs (tone) before the us (shock) turns off the cs, and the us is omitted on that trial, escape trial: failure to respond during the cs, results in presentation of the us which remains on until the response occurs at which time the cs and us are turned off, mostly escape trials early in acquisition. Shuttle box apparatus avoidance behavior: theory: two process theory of avoidance (mower) (cid:224) how can not getting something be rewarding, theory postulates an interplay between pavlovian and instrumental processes (cid:224) through cs shock pairings, cs comes to elicit fear (i. e. bell triggers salivation) (cid:224) operant avoidance response reinforced by termination of cs which reduces conditioned fear elicited by the cs (cid:224) avoidance responding reinforced by change in internal stimulation (fear reduction) rather than the absence of aversive stimulus (cid:224) escape from conditioned fear is the critical event, not prevention of shock.
