The mothers and fathers of 11 preschool autistic children were taught operant procedures used in teaching speech to nonverbal children. At posttreatment, the children showed significant gains in pre-speech and speech skills as measured by a 21-step hierarchy of speech behaviors. (Author)

This critical review examines 10 controlled studies in which traditional operant behavioral procedures were compared with normalized interventions for teaching language to young children with autism. It concluded that normalized language training was substantially more effective than discrete-trial training and yielded more positive parental…