1. Schedules of Reinforcement
Operant Conditioning
Schedules of Reinforcement

2. Partial Schedules of Reinforcement
Ratios = a number of times
Interval = a time period elapsed
Fixed = remains the same, predictable
Variable = changes, unpredictable

3. Fixed Schedules Variable Schedules
Variable Ratio – reinforcement after a varying number of responses
Variable Interval – reinforcement of first response after varying amounts of time
Fixed Ratio – reinforcement after a fixed or set number of responses
Fixed Interval – reinforcement of first response after a fixed amount of time has passed

4. Answer: Variable Ratio
A person purchases a lottery ticket and wins.
Answer: Variable Ratio

5. A worker may take a 15-minute break after working for four hours
A worker may take a 15-minute break after working for four hours. Answer: Fixed Interval

6. A man scans the sky for shooting stars at night
A man scans the sky for shooting stars at night. Answer: Variable Interval

7. A teenager receives an allowance every Saturday for completing his chores. Answer: Fixed Interval

8. A baseball player hits a home run. Answer: Variable Ratio

9. A basketball player is ejected from the game after committing five fouls. Answer: Fixed Ratio

10. A charitable organization makes an average of 10 phone calls for every donation it receives. Answer: Variable Ratio

11. A man checks his bank account periodically to see if his income tax return has been deposited yet. Answer: Variable Interval

12. Receive $10 off your next purchase after spending $100 in the store
Receive $10 off your next purchase after spending $100 in the store. Answer: Fixed Ratio

13. A teacher gives a quiz every Friday.
Answer: Fixed Interval