Final answer:
A compound schedule occurs when two or more contingencies of reinforcement operate independently and simultaneously for two or more behaviors.
Step-by-step explanation:
A compound schedule occurs when two or more contingencies of reinforcement operate independently and simultaneously for two or more behaviors. One example of a compound schedule is the fixed interval reinforcement schedule. In a fixed interval reinforcement schedule, behavior is rewarded after a set amount of time. For instance, if a person receives a paycheck every two weeks, their behavior of working is reinforced on a fixed interval schedule.