The study was designed to make a 6 year old autistic child's learning sessions more productive by reducing three self stimulatory rituals. Treatment involved structured academic sessions involving the S and one other child in basic motor and vocal imitation training which was done according to Discrete Trial Format followed by structured play. In addition, consequences of brief immobilization were applied if the S emitted any of the target behaviors. Sessions began with the investigation placing a small beach hat on the S's head. S's self stimulatory behavior was almost totally eliminated in the presence of the beach hat. (SB)