What is the term for reinforcement that occurs after a specific number of responses?

The term that describes reinforcement occurring after a specific number of responses is "fixed ratio." In this type of reinforcement schedule, a reward or reinforcement is given after a predetermined number of responses have been made. For example, a worker might be paid for every ten units they produce, which clearly illustrates how the reward is contingent upon completing a set number of tasks.

This type of schedule often leads to high rates of response because the subject knows exactly how many responses are required to receive reinforcement. The predictability encourages consistent effort, as individuals or animals understand they need to perform a specific action multiple times before receiving a reward.