Fixed Ratio

John ordered a package online on Monday. The website said it will be delivered in 3 business days.  Reinforcer: 3 business days

Variable Ratio

Bob flipped a coin 10 times and got heads 5 times. Reinforcer: got heads 5 times.

Fixed Interval

George goes to bed at 10:00 every night Enforcer: goes to bed at 10:00

Variable Interval

Scott takes his dog to the groomer and waits for it to be done. Reinforcer: waits for his dog .

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