Over the years at cosmos widget factory, mr. cosmos has noticed that each employee tends to be most productive in the weeks just before his or her biannual performance review. had mr. cosmos read chapter 5 on "learning." he would know that his employees' behavior was:
a) an example of stimulus control.
b) the result of being conditioned on a fixed-ratio schedule of reinforcement
c) the result of being conditioned on a fixed-interval schedule of reinforcement
d) an example of learned .

c) the result of being conditioned on a fixed-interval schedule of reinforcement.                    

Explanation:

Fixed-interval schedule: The term fixed-interval schedule is being used in the operant conditioning, and is referred to as a reinforcement schedule in which the first response is being awarded after a specific amount of time. In this schedule, at the end of the interval, the high response occurs but less and slow response is acquired just after the delivery of the reinforcer.

In the question above, Mr Cosmos's employee's behavior was the result of being conditioned on a fixed-interval schedule of reinforcement.

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