PS261 Lecture Notes - Lecture 4: Classical Conditioning
Document Summary
Probability of us, given that the cs has occurred. Some notion: p(x) = probability that x happens, p(x|y) = probability of x given that y has happened. In all of our examples so far: p(us|cs) = 1 (he always got the steak, p(us|nocs) = 0 (probability that you are going to get steak given that the buzzer has not rung is zero) Theory 1: the cs becomes a replacement us and releases the ur (cr, the response transfers from the us to the cs, animals learn a stimulus-response chain, problem: cr is not necessarily the same as the ur. Theory 2: the cs evokes a representation of the us, the animal emits a cr because the us elicits a response, animals learn a stimulus-stimulus (s-s) association. Tendency for cs to occur to stimuli that is similar to cs. E. g. animals react to things similar to the conditioned stimulus (so for pavlov the bell is a different pitch)
