In applied behavior analysis, what is the term used for a stimulus that increases the likelihood of a behavior?

In applied behavior analysis, a reinforcer is defined as a stimulus that, when applied following a behavior, increases the likelihood of that behavior occurring again in the future. This concept is crucial in behavior modification, as it helps to promote desired behaviors by providing a positive or strengthening stimulus after the behavior is demonstrated.

For instance, if a child receives praise or a reward for completing their homework, that reinforcement increases the probability that the child will complete their homework again. Reinforcers can be tangible items, social praise, or even activities that are enjoyable to the individual.

Other terms listed in the options have different meanings within the context of behavior analysis. A punisher decreases the likelihood of a behavior by introducing an aversive consequence. A neutral stimulus does not influence behavior significantly; it neither increases nor decreases the likelihood of a specific behavior. An antecedent refers to a stimulus that occurs before a behavior and sets the stage for that behavior, but it does not itself increase the likelihood of the behavior occurring.