Elizabeth s parents want her to put her clothes in the hamper. At first, they praise her for putting the clothes together in one pile. Then they praise her for getting the clothes on the same side of...

Elizabeth s parents want her to put her clothes in the hamper. At first, they praise her for putting the clothes together in one pile. Then they praise her for getting the clothes on the same side of the room as the hamper. When she gets the clothes on top of the hamper, she gets praise. Finally, her parents praise her when she puts her clothes in the hamper.