Identify the schedule of reinforcement (FR, VR, FI, VI)

1. Frequent flyer program: getting a free flight after accumulating x number of flight miles. Fixed ratio
2. Fly fishing
   Variable ratio
3. Receiving a good grade for reading x number of chapters of the book Fixed ratio
4. Athlete signs contract whereby his salary increases are renegotiated every three years. Fixed interval
5. Playing Bingo Variable ratio
6. Waiting for a taxi cab. Variable interval
7. Going up a staircase, you must go up the same number of stairs to get to the landing Fixed ratio
8. Selling Girl Scout cookies door to door Variable ratio
9. Random drug testing Variable interval
10. Speed traps on highway Variable interval
11. Individuals collect bottles, cans, and other recyclables get payment for a specific amount of these items Fixed ratio
12. Number of “throws” to get a strike in bowling Variable ratio
13. Getting clean clothes from the washing machine once the cycle is finished Fixed interval
14. Fishing
    Variable interval
15. Signaling while hitchhiking Variable ratio
16. Doing 20 sit-ups to keep fit Fixed ratio