Final answer:
Sheila's bonus payment practice aligns with the Fixed Interval reinforcement schedule in psychology, where responses are reinforced after a specific time period.
Step-by-step explanation:
Sheila's bonus payment based on every two years of work she has completed falls under the category of a Fixed Interval reinforcement schedule. In Psychology, a Fixed Interval schedule is a type of reinforcement schedule in which a response is reinforced after a specific time period has elapsed. This schedule produces a 'scalloping' pattern of behavior with responses becoming more frequent as the reinforcement time approaches. Sheila, knowing that she will receive a bonus every two years, is an example of this schedule as the reinforcement (bonus) is given at fixed time intervals (every two years).
Learn more about Fixed Interval Reinforcement Schedule