Rice, M.L. (2000). Grammatical symptoms of specific language impairment. In D.V.M. Bishop & L.B. Leonard (Eds.), Speech and language impairments in children: Causes, characteristics, intervention and outcome (pp. 17-34). East Sussex, England: Psychology Press Ltd.
This chapter lays out a program of investigation aimed at the identification of a clinical grammatical marker for the condition of Specific Language Impairment (SLI) in children (and adults), beginning with a description of the theoretical framework and predictions, followed by an overview of available evidence from longitudinal studies of affected and control children and from family history data that indicate a pattern of familiality (as would be expected for an inherited condition). It is argued that a primary benefit from this line of inquiry is that it helps further our understanding of "immature" language that may or may not be "outgrown" and possible causes of grammatical limitations. The chapter concludes with a discussion of the clinical implications of the grammatical marker and the promise of the marker for investigations of the etiology of SLI.