Sentence comprehension strategies in children with autism and specific language disorders.

Two groups of children with language disorders--one group with autism and one with relatively specific language impairment (LI)--and two groups of normal children matched to the disordered groups for mental and receptive language age were asked to act out a series of sentences. Half the experimental sentences were in active voice, and half were the same sentences given in passive voice. Within each set, events described in the sentences were probable, neutral, or improbable. Results revealed that the autistic group made little use of a semantically based probable event strategy for acting out sentences, but were likely to use a syntactically based word order strategy. The LI group was no more likely than the autistic group to use the semantic strategy, and was equally likely to use word order. Both groups resembled normals matched for receptive language age.