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Lecture

PSY100Y5 Lecture Notes - Classical Conditioning, Conditioned Taste Aversion, Operant Conditioning


Department
Psychology
Course Code
PSY100Y5
Professor
Dax Urbszat

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PSY100
May 18th
Learning
-learning refers to an enduring change in the way an organism responds based on its
experience
-distinct form
odrug effects (caffeine-induced jitters are not learning)
odifferent from fatigue or illness
-3 assumptions of learning theories
o1. responses are learned rather than innate
o2. learning is adaptive
o3. our experiments can uncover the laws of learning
these laws will apply to animals and humans
Classical Conditioning
-the Russian physiologist Pavlov noted that reflexive salivation in dogs could be elicited by
stimuli associated with feeding
-reflex: response that is reliably elicited by a stimulus
ofood elicits salvation
oair puff elicits eye blink
-reflexive stimulus and response are unconditioned
-neutral stimulus is referred to as the conditioned stimulus (CS)
-CS is paired with the UCS over many trials
-Eventually comes to elicit a conditioned response (CR: resembles the UCR)
Pavlov’s experiment
-meat is unconditioned stimulus – they salivate (unconditional response)
-the bell has no response
-pairing the bell and the meat, on the 4th day just rings the bell, if the dog salivates, he
created the classical conditioning experience
-prior to conditioning:
ounconditioned stimulus (meat) unconditioned response (salvation)
oneutral stimulus (bell) no unconditioned response (no salivation)
-during conditioning:
oneural stimulus (bell) UCS (meat) UCR (salivation)
-after conditioning:
oconditioned stimulus (bell) conditioned response (salivation)
Acquisition and Extinction
-the easier it is to acquire the conditioning, the harder it is to extinguish
-acquisition of classical conditioning:
orepeated pairings of CS and UCS
-extinction: refers to the weakening of conditioning evident when the CS is presented
repeatedly without the UCS
-spontaneous recovery: refers to the re-emergence of a previously extinguished CR
Stimulus Generalization and Discrimination
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