Antecedent

What comes immediately before the behavior.

Consequence

What immediately follows the behavior.

Reinforcement

The addition or removal of something following a behavior that results in an increase in frequency of that behavior in the future.

Extinction

A discontinuance of reinforcement of a behavior that results in a decrease of the future frequency of that behavior.

Reinforcer

Something added or removed following a behavior, resulting in an increase of that behavior in the future under similar circumstances.

Punishment

The addition or removal of something following a behavior that results in a decrease in frequency of that behavior in the future.