Little Billy likes to make everyone laugh with his loud belches in the middle of a meal. However, Grandma thinks this behavior is unacceptable. Little Billy needs to stop belching during the meal so that Grandma doesn't make a scene at this year's Thanksgiving dinner.
Little Billy's mom (Suzie) wants to make sure that Billy doesn't belch at all during the Thanksgiving dinner this year, so she came up with a plan about a month and a half before the big dinner.
Each night at the dinner table Billy belches while he is eating his food. One night Suzie told Billy that if he didn't belch during dinner, she would give him a piece of pumpkin pie which was his favorite type of pie.(This is a positive Reinforcement and it is a Primary Reinforcer)
For a week Suzie, gave Billy a slice of pie if he didn't burp at the dinner table, however, she knew that if she wanted to prevent Billy from starting this negative behavior again that she'd need to change things up...
So, Suzie began to randomly give him pie whenever he didn't belch at dinner. Sometimes he wouldn't belch at dinner for four days before got a slice of pie. Other times he wouldn't belch at dinner for two days before he got pie.(This is an example of Variable-Interval Schedule)
When Thanksgiving Dinner came around, Billy didn't belch once and that made grandma very happy!