Dapple, someto=imes we need to look beyond the behaviour to the cause or we can miss something important. Some children with autism flap their hands. now we can either find the cause of the flapping or do behaviour therapy to try and TRAIN them to stop. The trouble with the latter is we could miss something important. I know of a child who was doing this because the only way he could see properly was when he flapped his hands at the side of his head. If we had just TRAINED him to stop this vision problem would have been missed, don't you agree?