Glossary

Unconditioned Response

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What is an unconditioned response?

In classical conditioning, an unconditioned response (UCR) is a response elicited by an unconditioned stimulus without requiring the conditioning being studied.

Example

In Pavlov's work, salivation in response to food is an unconditioned response. Salivation to a previously paired signal is a conditioned response.

Unconditioned response versus unconditioned stimulus

The stimulus is what elicits the response; the response is what the organism does. In the food example, food is the unconditioned stimulus and salivation is the unconditioned response.

Why the distinction matters

The response can look similar while the stimulus eliciting it differs. Identify what produced the response and what was learned in the procedure.

Sources and further reading