Final answer:
The schedule of reinforcement you are using with your son is Fixed Ratio (FR).
Step-by-step explanation:
The schedule of reinforcement you are using with your son is Fixed Ratio (FR). In a fixed ratio schedule, a specific number of responses must occur before the behavior is rewarded. In your case, your son needs to complete 10 chores to earn a small toy. This schedule is often used to maximize the quantity of output, as it reinforces a higher response rate with a short pause after reinforcement.