During a typical morning, Colin will check the clock more frequently as the time for his regularly scheduled lunch break approaches. In this case, Colin's clock checking behavior is reinforced on a schedule.

A. variable-interval
B. fixed-interval
C. variable-ratio
D. fixed-ratio

B. fixed-interval

Explanation:

During a typical morning, Colin will check the clock more frequently as the time for his regularly scheduled lunch break approaches. In this case, Colin's clock checking behavior is reinforced on a fixed-interval schedule

A fixed-interval schedule is kind of schedule which involves reinforcement, where the initial or first response is rewarded after a predetermined amount of time as passed or go by.

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