A series of three experiments was conducted with three severely retarded children to investigate the vocalization-producing potential of two antecedent conditions: adult talk (commonly cited antecedent) and adult silence. (Author/CL)

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…

Two boys, ages 7 and 9, with severe developmental disabilities were taught to use requests conditionally (when desired items were proximally distant) to obtain desired snack items. Results suggest that the conditioned discriminations were established quickly and both learners generalized their conditional discriminations to other contexts.…

A training program in which operant procedures were used to improve the identification and definition of selected vocabulary words by a 6-year-old mildly retarded Down's syndrome girl is described. Results showed that the S had generalized the training and the findings were replicated with two additional children. (PHR)