A 4-year-old child is lying in bed at night while the parents are sitting in...

A 4-year-old child is lying in bed at night while the parents are sitting in the living room talking to guests. The child begins to make loud noises. In the past, the parents have gone into the child's room to quiet him. The parents and guests agree to ignore the child completely and continue to talk. If the parents stick with this approach and the child stops making noises, the parents have successfully useD.