Extinction occurs when a CS is no longer matched with a UCS. This implies that extinction results from learning and not from memory loss.

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Extinction in classical conditioning occurs because the conditioned stimulus (CS) is repeatedly presented without the unconditioned stimulus (UCS), leading to a decrease in the conditioned response over time. This process involves learning that the CS no longer predicts the UCS, rather than simply forgetting the association.

Extinction Occurs When a CS Is No Longer Matched with a UCS