Two methods (signs presented with or without accompanying verbal label) of training autistic children to use manual signs were compared. The efficacy of training in both treatment conditions was demonstrated but no clear differences in acquisition speed across conditions were apparent. (Author/CL)

Five children with severe educational retardation, aged 5-12, were involved in sign training in which the spoken words corresponding to signs were receptively known to participants. Whether signs were taught concurrently or in a serial fashion, signs taught by total communication were acquired faster than those taught by sign-alone training.…

Total communication procedures were used with three severely mentally retarded children (mental ages 2 to 4) to examine the effects of receptive speech on the acquisition and maintenance of manual signing. Signs corresponding to known words were generally acquired faster and retained better than signs corresponding to unknown words. (Author/JW)