acquisition of a response (CR) occurs when the CS predicts the UCS, and extinction occurs when the CS no longer predicts the UCS. If the conditioned stimulus is presented by itself, extinction occurs.

Extinction refers to the reduction in responding that occurs when the conditioned stimulus is presented repeatedly without the unconditioned stimulus.

extinction: One of the basic phenomena of learning that occurs when a previously conditioned response decreases in frequency and eventually disappears. operant conditioning: Learning in which a voluntary response is strengthened or weakened, depending on its positive or negative consequences.

A learning process in which an originally neutral stimulus, by repeated pairing with a stimulus that normally elicits a response, comes to elicit a similar or even identical response. Known as Pavlovian conditioning. Sometimes called Stimulus-Stimulus learning.

Antecedent is an earlier clause, phrase, or word to which a pronoun, noun, or another word refers. Broadly speaking, antecedent is a literary device in which a word or pronoun in a line or sentence refers to an earlier word.

An antecedent is a stimulus that cues an organism to perform a learned behavior. When an organism perceives an antecedent stimulus, it behaves in a way that maximizes reinforcing consequences and minimizes punishing consequences.

However, the following indefinite pronoun antecedents may be either singular or plural, depending upon how they are used in a sentence.