PNB 2XC3 Lecture Notes - Lecture 8: Prior Probability, Posterior Probability, Milk Bottle
16 Dec 2017
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Document Summary
Post- response to jet of water after nothing or after a touch. Reaction to a stimulus (mechanical shock or shadow) Shows habituation because the reaction is diminishing. After the shadow and showing the shock again, there is a response again. Habituation- anxiety about finals in first year vs. fourth year. Sensitization- fearful event that product fear response to other stimuli. Responding to a puff of air (ucs) Higher learning rate if cs precedes us (optimal separation of delay, tone comes a little before air puff) Why: if they happen too close there is divided attention, if it happens too far then they are not associated, no good temporal link. Extinction: beginning of extinction if tone comes without air puff, they are no longer paired. When cs is associated with increased probability of the us. Second test: updating prior probability from new information, the probability goes higher. Probability of having hiv increases with more positive tests.
