Your friend teaches preschool, and there is one little boy in her class who is giving her fits. he is constantly misbehaving, throwing toys, threatening other children, and sometimes even physically attacking them. so far, her stern punishment has stopped his destructive behavior when she's there, but when she leaves the room or when a substitute fills in, he's back to his old ways. you suggest that she use dissonance to change his behavior permanently. what would you tell her?