Which scenario is an example of a Fixed Interval Schedule?

A Fixed Interval Schedule is characterized by the delivery of a reward after a specific amount of time has passed, regardless of the frequency of the desired behavior occurring within that timeframe. In this case, the correct answer illustrates this concept perfectly, as Jacob earns $1 after completing a set period of 60 minutes of practice.

This means that whether he plays one song or several during that hour, the reinforcement (earning the dollar) will be provided consistently at the conclusion of each 60-minute interval. The focus is on the duration of time rather than the number of actions performed, which aligns perfectly with the definition of a Fixed Interval Schedule.

Other scenarios do not fit this description. For instance, earning $1 for every 3 songs practiced emphasizes a direct relationship between behavior (the number of songs) and the reward, aligning more with a Fixed Ratio Schedule. The unpredictability of earning a reward in one of the options indicates a variable strategy, while earning $1 on average after a set number of songs suggests a variable ratio schedule, where the reinforcement is contingent upon an average number and adds further complexity to the timing of reward delivery.