He congratulated her and rewarded her with an energy drink and grapes for her behavior.
Today is Hailey's first tennis practice of the season.
Her coach tells her that he will give her a snack and drink every timeshe hits the ball in the court. The snack and drink are the reinforcer and hitting the ball in is the target behavior. This is a type of positive reinforcement
She hit the ball and sees that the ball lands in the court!
Her coach tells her that she will have to keep up with this learned behavior even when incentives aren't involved. There will be a schedule of reinforcement. This will be a variable-ratio schedule. For example, one of her favorite snacks will be given to her as a surprise after the behavior of hitting the ball in is preformed a certain amount of times.