The results indicated that overcorrection plus positive reinforcement was effective in teaching one sign (milk); however, an added contingent exercise (having to stand up and sit down 10 times for an incorrect response) was required to teach the second sign (cookie). (Author/SW)

The longitudinal study investigated the language acquisition strategies employed over one and one-half years by an eight-year-old autistic child learning sign language. There were specific deviations in language development noted, in spite of providing the child with appropriate sign language training. (Author)