Answer: Fixed interval
Explanation:
The fixed interval schedule is works in the operant conditioning where the schedule of the reinforcement are rewarded firstly after some specific time that are elapsed.
The FI schedule stand for the fixed interval schedule and it is also known as periodic reinforcement. The fixed interval means that the response has been done on the regular bases in the specific period of time.
In the given situation, the incentive plan basically illustrate the fixed interval schedule of the reinforcement.