Developmental perspectives on Specific Language Impairment: Evidence from the production of wh-questions by Greek SLI children over time

This study investigates the performance of seven Greek SLI children on the production of wh-questions at two points in their linguistic development. In particular, it compares and discusses the results of two experiments on the production of subject and object wh-questions; the second experiment was carried out 5 years after the first one. Despite the SLI children's significant improvement in the production of subject and object wh-questions, the results indicated persistent problems with specific grammatical operations. Adopting a developmental perspective, issues concerning the linguistic deficits in SLI are discussed.