A conditioned stimulus is presented repeatedly without the paired presentation of the UCS. After time, the subject no longer makes the conditioned response. This fading of the CR is known as habituation.

Conditioned Stimulus

An initial neutral cue that, once linked with an unconditioned stimulus, gradually leads to a conditioned response.

Conditioned Response

A learned response to a previously neutral stimulus that has become conditioned by being paired with an unconditioned stimulus.

Habituation

A psychological learning process wherein there is a decrease in response to a stimulus after being repeatedly exposed to it.