If an operant response leads to reinforcement, then the rate of the response increases. Thus, these responses get results in reinforcement that is most likely to recur in adverse situations in the particular organisms. Thus, operant behavior is controlled by these types of consequences.
According to Skinner, reinforcement can be visualized by studying the throughout effects on behavior. Thus, anyone can acts as a reinforcer for one organism under one set of situations that does not imply that it will considered as a reinforcer for same organism or another group of organism under different set of conditions that overall highlights the concept of reinforcer.
Thus, Skinner proposed the term reinforcer that can be defined as anything that can changes the rate within which that response has to be made by applying contingency to a particular response. He used this term for applying no additional demands to be charged that explain the mentalism by accepting “satisfying state of affairs”.