Basic Assumptions Internal Processes Learning = Behavior Change S-R Psychology Equipotentiality Organisms are Blank Slates Learning from Environment Parsimonious Theories
Ivan Pavlov Physiologist Measuring salivation Serendipitous findings
Classical Conditioning Also called Pavlovian or Respondent conditioning Association between two or more events Definition: The presentation of two or more events in an experimentally determined temporal relationship
Classical Conditioning
Classical Conditioning This reflex was “psychological” because it was based on the dog’s previous experiences.
Elements of Classical Conditioning Unconditioned stimulus (UCS) Event that regularly elicits (leads to) a certain response “without having been learned” Unconditioned response (UCR) (reflex) Response elicited by UCS Conditional stimulus (CS) Previously neutral stimulus – elicited no response beyond orienting response Conditional response (CR) Response to CS
+ = = =
Concept Check: A musical tone is played, then a puff of air is blown into a rabbit’s eye. After several repetitions of this procedure, the rabbit closes its eye when the musical tone is played. Look in your notes and see if you can answer the questions.
Concept Check: A musical tone is played, then a puff of air is blown into a rabbit’s eye. After several repetitions of this procedure, the rabbit closes its eye when the musical tone is played. What are the: UCS UCR Neutral Stimulus/CS And CR? – Air puff – Closing eye – Musical tone – Closing eye
What factors affect conditioning?
What factors affect conditioning? Number of pairings – The more pairings of the CS and the US, the stronger the conditioning Timing – next slide
Timing Order of Pairings: Delayed Trace Simultaneous Backward
Variables Influencing Conditioning Nature of the CR Most of the time, they are same as the UR, though often not as strong Nature of the US Intensity The Role of the CS Detection Novelty ( CS preexposure effect)
Stimulus Generalization Discrimination
Why is generalization important? Makes it unnecessary to learn the significance of every stimuli in the environment
Why is generalization important? Makes it unnecessary to learn the significance of every stimuli in the environment Why might generalization sometimes be counter-productive?
Ever need to pee while trying on pants at a retail location? VIDEO
Do you have examples?
Pavlov gets fancy: Higher (Second) Order conditioning We pair a CS 1 (bell) with a US (food) Then a new CS 2 (buzzer) is paired with CS 1 (bell) CS 2 acquires CS properties without ever being paired with US!
Example: Put pictures in here Money is a conditioned stimulus The food that you buy with it is US Birthday cards are a conditioned stimulus of a higher order because you have never bought anything with a birthday card.
John Watson Showed that Pavlov’s Classical Conditioning would work on humans’ emotions