evaluate the ability of autistic children to use expressive language and receptive language

introduction: in early typical language development, children understand words before they are able to use them in speech. children with autism spectrum disorders (asd) generally show impairments in both the comprehension and the production of language. however, the relative degree of delay or impairment in each of these sub-domains may also be atypical and remains less well-understood. materials and methods: this study was a causal-comparative that including 30 children ( 15 girls and 15 boys) with asd,   who elected by random sampling. data analysis was done using spss-16 and t-student test. results: results of t- tests showed significant differences between the two groups, autistic and normal children in the expressive language skill, cognitive and received language skill (p<0.05). there is a big difference between the mean scores of test niosha in subjects with autism compared to standard scores. conclusion: according to the findings of the present study, the language disorder in children with autism compared to normal children   is  significantly higher.