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Lecture 2
PSYC 3410 Lecture Notes - Lecture 2: Classical Conditioning, Eyeblink Conditioning, Conditioned Taste Aversion
by OC993820
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Classical Conditioning Basics
-unconditioned stimulus (US) elicits an unconditioned response (UR)
-Neutral stimulus (NS/CS) + Unconditioned Stimulus (US) elicits an unconditioned response
(UR)
-Conditioned Stimulus (CS) elicits conditioned response (CR)
•The neutral stimulus becomes the conditioned stimulus after the behaviour has become
conditioned
Commonly Studied Conditioned Behaviours
-Conditioned Emotional Response (fear)
•using an aversive unconditioned stimulus to cause the conditioned stimulus to elicit a
fearful conditioned response
•the response of fear is the absense of behaviour
•Suppression ratio = CS responding
CS responding + pre-CS responding
•0 = perfect learning, 0.5 = no learning
-autoshaping
•conditioned stimulus is not necessarily treated as if it were the unconditioned stimulus
-taste aversion learning
•there is a long delay between eating food and feeling ill, even if the food didn’t directly
make you sick
•can last a lifetime after only one exposure
-eyeblink conditioning
•a bell precedes the puff of air
-proboscis extension reflex
•the bees who per (stick out their tongues) to sugar water are then conditioned to respons to
explosive chamicals with the sugar water as a reward
•the bees are trained to stick out their tongues in response to explosive chemicals
Procedures
-Backward Conditioning
•the unconditioned stimulus precedes the neutral stimulus
•child gets a lollipop after an injection, then the child might not like the lollipop
•often with pain because you feel the pain first and then check to see what the simulus was
that caused the pain
-delayed conditioning
•the neutral stimulus is still on when the unconditioned stimulus has its onset
•little albert experiment
-trace conditioning
•there is a long time delay between the neutral stimulus and the unconditioned stimulus
•taking medication
•food intolerance
-simultaneous conditioning
•sight + odour of food
•two stimuli that are part of the same overall stimuli
•phone vibrates and rings at the same time
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