Which of the following is NOT a type of reinforcer?

A compensatory reinforcer is not recognized as a formal category of reinforcer in behavioral analysis. The established types of reinforcers include conditioned reinforcers, which are learned through association with primary reinforcers; primary reinforcers, which are naturally reinforcing and satisfy a basic need (like food or water); and secondary reinforcers, which are also learned but typically represent or are associated with primary reinforcers (like money).

Because compensatory reinforcer does not fit into these well-defined categories, it is not considered an official type of reinforcer in the context of behavior analysis. Understanding these distinctions is crucial for implementing effective behavior modification strategies based on reinforcement principles in practice.