Peggy wanted to teach her dog how to roll over. she tried giving him instructions, but it didn't work. she tried waiting for him to roll over so she could reinforce the behavior, but she had to go to bed before the dog rolled. finally, she began reinforcing the dog when it made behaviors that more closely resembled rolling over. at last, using she was able to teach the dog to do the trick.

shaping

Explanation:

In psychology, the term "shaping" refers to learning new behaviors based on the gratifications and punishments (satisfactions and dissatisfactions) that we receive or impose on someone when we want to stimulate a particular behavior. An example of this can be seen in the question above, where Peggy is trying to roll her dog through some instructions. Peggy is shaping her dog so that it takes on a behavior that is desired by her.