Final answer:
The difference between Jerry's and Joe's payment methods is the difference between fixed interval and variable ratio reinforcement schedules.
Step-by-step explanation:
The difference between the way Jerry gets paid and the way Joe gets paid is the difference between fixed interval and variable ratio schedules. In Jerry's case, he receives a regular paycheck after a set amount of time, regardless of how many items he produces, which aligns with a fixed interval schedule. Conversely, Joe is paid based on the number of items he produces; therefore, the number of responses (or products made) before he is rewarded varies, which is characteristic of a variable ratio schedule.