Answer:
Fixed interval
Step-by-step explanation:
Reinforcement schedules are the guidelines which decide how often an organism is reinforced for a specific behavior. A fixed-interval schedule is used in operant conditioning and it is a reinforcement schedule where the initial response is only rewarded after a given amount of time has passed. While in a partial schedule only some of the behavioral instances are improved, and not every occasion. Behaviors are formed and developed more slowly through a partial reinforcement schedule.