What format is used in fixed-interval reinforcement?

In fixed-interval reinforcement, rewards are provided after a specific, predetermined amount of time has passed, regardless of how many times the behavior is performed during that interval. For instance, if an individual is reinforced with a reward after every 5 minutes of a specific behavior, it creates a schedule where they know that as soon as 5 minutes pass, they will receive the reward. This creates a clear pattern that individuals can learn and anticipate, making it distinct from other types of reinforcement schedules.

The predictability of reinforcement in a fixed-interval schedule can lead to a pattern of behavior where the individual might increase their engagement as the end of the interval approaches, a phenomenon known as "scalloping" in behavioral psychology. By setting a consistent time frame for reinforcement, individuals are encouraged to perform the desired behavior in anticipation of receiving a reward at a regular interval.