Showing Bidirectional approach in Clinical Linguistics with language impairement

Despite numerous foreign studies in clinical linguistics, few studies conducted in our country. However, development of it, not only can help to the examination of speech and language disorders, but it also can provide a basis for linguistic hypotheses and theories. Explaining this bidirectional approach in clinical linguistics we examined 6 children with specific language impairement, and besides showing the characteristic of these children, we used this clinical data for showing modularity in language.
We used narrative speech, language development and specific language impairment tests for diagnosis, and Independent t-test, Man Whitney and Wilcox tests for analyzing data. It is shown that the children with SLI perform much below their age-level with respect to grammatical properties (time agreement), but in pragmatic properties (reference) they don’t have meaningful differences.
This finding provide support for the hypothesis that grammar and pragmatics are two independent language component and the hypothesis that children with SLI are impaired in their grammer, but not in their (interface) pragmatics.
Result of this study showing that impairment in grammer beside good performance in pragmatic besides using linguistic in characterizing language disorders; provide support for using clinical data in linguistic theories such as modularity of language