Final answer:
Postreinforcement pauses occur in schedules like fixed interval and variable interval.
Step-by-step explanation:
A postreinforcement pause refers to a pause in behavior after a reinforcement is given. This pause occurs in certain types of reinforcement schedules, such as the fixed interval schedule and the variable interval schedule. In a fixed interval schedule, the behavior is rewarded after a set amount of time, which leads to a pause in behavior immediately after reinforcement. In a variable interval schedule, the behavior is rewarded after varying amounts of time, which also produces a postreinforcement pause.