A child who receives candy occasionally for asking her grandmother for a treat is rewarded on which type of schedule?

The child's experience with receiving candy for asking her grandmother for a treat fits the variable ratio schedule of reinforcement. In a variable ratio schedule, reinforcement is provided after an unpredictable number of responses. Since the child receives candy occasionally rather than every time she asks, this introduces an element of variability in the reward.

This unpredictability encourages the child to continue asking for candy, as she doesn't know when the next reward will come, but she knows that asking can lead to a reward. This kind of reinforcement schedule is particularly effective because it creates a high and steady rate of responding; the child experiences excitement and anticipation with each request, reinforcing her behavior over time.

In contrast, the other types of schedules (fixed ratio, continuous, and fixed interval) involve more predictable patterns of reward that do not match the scenario presented.