Final answer:
Child participants' use of coping strategies is expected to increase when prizes are consistently offered during the second week, then decrease in the third week when reward becomes unpredictable.
Step-by-step explanation:
The frequency with which each child engages in coping strategies during the follow-up study is likely to increase over the first two weeks and then decline on the third week. Intrinsic motivation for problem-focused coping strategies typically involves actively addressing issues directly causing stress. When external rewards are introduced for performing these strategies, as was done in the second week of the study, it can bolster the behavior due to the additional extrinsic motivation. However, this boost may diminish when rewards become unpredictable, as implemented during the third week. The uncertainty of receiving a prize can reduce the frequency of the behavior, which incorporates principles of operant conditioning prominently featured in learning theories.