Seven-Year-Old Hilary's Parents Have Paid Her 50 Cents Every Time

Multiple Choice

Seven-year-old Hilary's parents have paid her 50 cents every time she cleans up her room. Sue's parents have sometimes paid her 50 cents for cleaning her room, but frequently have not paid her. Now both sets of parents stop paying. Which girl will probably continue cleaning her room the longest, and why?

A) Hilary, because extinction of responses tends to be faster after intermittent reinforcement than after continuous reinforcement
B) Hilary, because of the law of effect
C) Sue, because extinction of responses tends to be slower after intermittent reinforcement than after continuous reinforcement
D) Sue, because of the law of effect