Fixed Ratio: Punch Card for every ten visits to the car wash, you get your 11th one free.
Reinforcer: 11th Car wash free.
Variable Ratio: Mclovin campaign where a customer is randomly selected for a free meal at McDonald's.
Reinforcer: Free meal at McDonald's.
Fixed Interval: A child finishes his homework is and able to have extra free time.
Reinforcer: Extra free time.
Variable Interval: Taking naps throughout the week.
Reinforcer: Getting Extra Sleep.