Which scenario exemplifies DRH?

The scenario where a child receives tokens for contributing more answers in class exemplifies Differential Reinforcement of High Rates of Behavior (DRH). This concept emphasizes reinforcing behaviors that occur at higher frequencies, encouraging more of the desired behavior—in this case, participating in class by answering questions. By providing tokens as a form of positive reinforcement, the child is motivated to engage more, thus increasing their overall level of participation.

In the context of the other scenarios, they do not focus on reinforcing higher rates of behavior. While a reprimand or negative consequences can often discourage behavior, they do not promote an increase in participation or effort. Offering extra recess for completing a solitary task might reinforce a specific behavior but does not necessarily encourage a higher frequency of participation in that context, as the task is isolated and may not relate to social interaction or collaboration. Praising a child for being quiet during lunch highlights a specific behavior—being quiet—but does not align with the DRH approach, which focuses on increasing behaviors rather than controlling them.