| Abstract | (Introduction from the chapter)
Language specificity has been a central theme of recent research on language acquisition and language processing in persons with mental retardation (MR). The phenomenon of specificity is invoked by the general finding that (1) variability in language skill cannot be fully explained by general cognitive factors; and (2) some components within language are themselves separable. Although full linguistic mastery necessarily involves a combination of lexical, morphosyntactic, phonological, and pragmatic skills, it is becoming increasingly evident that these components may be differentially impaired or spared in persons with MR, especially beyond the earliest stages of development. In this chapter, which focuses on later language learning, these 4 language components will be considered separately to allow more detailed discussion of the nature and basis of language impairment in MR. |