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Classical conditioning is a form of associative learning in which a neutral stimulus, after repeated pairing with a stimulus that naturally triggers a response, comes to trigger that response on its own. It matters because Ivan Pavlov's experiments with dogs around 1900 and Watson and Rayner's 1920 "Little Albert" study showed that physical and emotional responses can be learned — a foundation of behaviorism and of modern exposure therapy for phobias.
This note explains:
- Pavlov's Experiments
- Unconditioned vs. Conditioned Stimuli
- Acquisition and Timing
- Extinction and Spontaneous Recovery
- Generalization and Discrimination
- Little Albert and Conditioned Emotions
- Classical vs. Operant Conditioning
- Applications in Therapy
Every classical conditioning setup has four parts: an unconditioned stimulus (food) that naturally produces an unconditioned response (salivation), and a conditioned stimulus (a metronome) that, once learned, produces a conditioned response…
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- Unconditioned stimulus (US) — naturally triggers a response without learning, like food making Pavlov's dogs salivate.
- Conditioned stimulus (CS) — a neutral cue, like a metronome, that triggers the response after being paired with the US.
- Acquisition — the association builds over repeated pairings, fastest when the CS comes just before the US.
- Extinction & spontaneous recovery — the response fades when the CS appears alone, then can briefly return after a rest.
- Little Albert (1920) — Watson and Rayner showed emotions like fear can be conditioned too.
Here's a quick quiz on Classical Conditioning. Ready?
- 1.In Pavlov's experiments, what was the unconditioned stimulus?
- 2.What is it called when a conditioned response fades because the conditioned stimulus keeps appearing without the unconditioned stimulus?
- 3.Which researchers conditioned a fear of a white rat in "Little Albert"?
- 4.What is it called when a response also occurs to stimuli similar to the conditioned stimulus?
- 5.How does classical conditioning differ from operant conditioning?
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