Reinforcement Schedules Review the four major schedules of reinforcement presented in the text-fixed ratio (FR), variable ratio (VR), fixed interval (FI), and variable interval (VI). Identify the schedule of reinforcement in each of the examples listed below. 1. A business that advertises that it will change your oil in 20 minutes offers you a free oil change after you have had your oil changed 5 times at their business. 2. Although farmers put out about the same amount of labor each year, sometimes they sell their grain at harvest time, sometimes in January, and sometimes in late March. 3. You are fly fishing in a great trout stream. Sometimes you catch a fish after only 4 or 5 casts; sometimes it takes 10 or 20 casts. 4. A bank employee is given a bonus of a $30 restaurant gift card for every 4 hours of overtime he volunteers to work. 5. A young child demands a candy bar each time she is in the checkout line at the grocery store. Sometimes the parent gives her one and sometime he doesn't. 6. A piano teacher gives a 6-year-old student a sticker for each song he plays well. 7. You are still fishing from a dock. You sit with your line in the water and wait for the fish to strike. Sometimes it takes only 20 minutes, and sometimes it takes an hour or more. 8. You do piece work in a factory. For every 3 sleeves you sew on garments, you get 50 cents. 9. For each half day that a second grader pays attention and works well, the teacher gives her a "Good Behavior" dollar that she can trade in at the end of the week for desired objects from the store. 10. A vacuum cleaner salesperson does numerous presentations in people's homes and gets paid a bonus each time he or she sells a vacuum. On average the salesperson does 5 presentations before a customer buys a vacuum. 11. Your paycheck for your job arrives on the 1st and the 15th of every month.