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Schedules of Reinforcement Additional Practice Helpful Hints! • To chose between INTERVAL and RATIO ask yourself: – Is TIME the major factor that causes a favorable outcome? (Interval) -OR– Is it the REPETITION of responses that causes a favorable outcome? (Ratio) Helpful Hints! • To chose between FIXED and VARIABLE ask yourself: – Is the time or repetition CONSTANT? (Fixed) -OR– Is the time or repetition RANDOM or IRREGULAR? (Variable) The most common reinforcement schedules are: fixed ratio Example: A farmer gets paid for every 10 bushels of apples fixed interval Example: Planned tests students cram because the time is near Is it FR, VR, FI or VI? 1. _____ Paid $10 for every 20 puzzles solved Is it FR, VR, FI or VI? 2. _____ Selling a product door to door Is it FR, VR, FI or VI? 3. _____ Getting the clothes out of the dryer once it buzzes Is it FR, VR, FI or VI ? 4. _____ Doing 20 pushups to help stay fit Is it FR, VR, FI or VI ? 5. _____ Waiting for a sunny day to go to the beach Is it FR, VR, FI or VI ? 6. _____ Surfer waiting for the perfect wave to ride in Is it FR, VR, FI or VI ? 7. _____ Students are released from class when the end-of-period bell rings. Is it FR, VR, FI or VI ? 8. _____ Every time you buy a sandwich at Subway you get your card punched; after 10 punches you get a free sandwich. Is it FR, VR, FI or VI? 9. _____ Sometimes the mail is delivered at 1:00, sometimes it’s closer to 2:00. Is it FR, VR, FI or VI? 10. _____ Once in a while you like to surprise your boyfriend or girlfriend with something nice. How’d you do?! Is it FR, VR, FI or VI? 1. _____ Paid $10 for every 20 puzzles solved Answer: Fixed Ratio – You must solve a certain number of puzzles before you’re reinforced. Is it FR, VR, FI or VI? 2. _____ Selling a product door to door Answer: Variable Ratio – The amount of times you need to go to a door before you sell products varies…but eventually you will sell the product. Is it FR, VR, FI or VI? 3. _____ Getting the clothes out of the dryer once it buzzes Answer: Fixed Ratio - You must go to the dryer a certain number of times (once) when it buzzes to get reinforced (clean clothes) Is it FR, VR, FI or VI ? 4. _____ Doing 20 pushups to help stay fit Answer: Fixed Ratio – You must do a certain number of pushups (20) to get the desired outcome (staying fit) Is it FR, VR, FI or VI ? 5. _____ Waiting for a sunny day to go to the beach Answer: Variable Interval – Reinforced after varying lengths of time • Ex. This week it’s 2 days and then sunny on Wednesday, next week it’s 3 days and then sunny on Thursday Is it FR, VR, FI or VI ? 6. _____ Surfer waiting for the perfect wave to ride in Answer: Variable Interval – Reinforced after varying lengths of time – Sometimes it’s 5 mins, sometimes it’s 10… Is it FR, VR, FI or VI ? 7. _____ Students are released from class when the end-of-period bell rings. Answer: Fixed Interval – After 90 mins students are released to go to their next class. Is it FR, VR, FI or VI ? 8. _____ Every time you buy a sandwich at Subway you get your card punched; after 10 punches you get a free sandwich. Answer: Fixed Ratio – Certain number of response (10 sandwiches)= free sandwich Is it FR, VR, FI or VI? 9. _____ Sometimes the mail is delivered at 1:00, sometimes it’s closer to 2:00. Answer: Variable Interval – Reinforced after varying lengths of time (between 1 and 2pm) Is it FR, VR, FI or VI? 10. _____ Child who like to hear theme music from Jeopardy weeknights at 7:30 p.m. Answer: Fixed Interval – Reinforced after certain period of time- wait until 7:30!