Bill begins giving his son a reward every time he cleans his room to encourage him to clean it more often. According to the principles of conditioning, what should Bill do to get his son to continue cleaning his room over time?

This option undermines the conditioning process by removing the incentive to clean. Without the expectation of a reward, the motivation to engage in the desired behavior diminishes, likely leading to a decrease in room cleaning.

Ceasing rewards entirely would likely extinguish the conditioned behavior. If the son no longer receives any positive reinforcement for cleaning his room, he may lose interest in doing it altogether, as there is no longer a motivational factor.

While increasing the reward might initially motivate the son, it is not sustainable. This approach can lead to diminishing returns, where the son comes to expect larger rewards and may become less responsive if the size is not continually increased.

This inconsistent approach could confuse the child and diminish the association between cleaning and receiving a reward. The unpredictability might lead to frustration rather than motivation, as he cannot anticipate when he will be rewarded.