AP PSYCHOLOGY

Detailed explanation-1: -Reinforcer A stimulus or event that increases the probability that the response it follows will be repeated.

Detailed explanation-2: -A reinforcer (positive reinforcer) is any stimulus, event, or condition whose presentation immediately follows a response and increases the frequency of that response (Malott, 2008, pp. 2–3)

Detailed explanation-3: -A reinforcer is ANY stimulus that increases the frequency of a behavior. To be a reinforcer stimuli must immediately follow the response and must be perceived as contingent upon the response.

Detailed explanation-4: -Skinner used the term reinforcer to refer to any event that strengthens or increases the likelihood of a behaviour, and the term punisher to refer to any event that weakens or decreases the likelihood of a behaviour.