Final answer:
The term 'Overreward' is not recognized as a standard reinforcement contingency in operant conditioning. The established types of reinforcement contingencies are Extinction, Positive Reinforcement, Negative Reinforcement, and Punishment, which either increase or decrease the likelihood of a behavior.
Step-by-step explanation:
The question which asks "Which of the following is not a type of reinforcement contingency?" refers to operant conditioning, a concept in psychology developed by B. F. Skinner. Reinforcement contingencies are designed to increase the likelihood of a behavior. Among the options provided, a) Overreward is not typically recognized as a standard type of reinforcement contingency. The recognized forms of reinforcement contingencies include b) Extinction, where a behavior decreases when reinforcement is no longer provided; c) Positive reinforcement, which involves adding a favorable stimulus to increase a behavior; d) Negative reinforcement, where an unfavorable stimulus is removed to increase a behavior; and e) Punishment, which can be either positive (adding an unfavorable stimulus) or negative (removing a favorable stimulus) to decrease a behavior.