Domain-General Versus Domain-Specific Accounts of Specific Language Impairment: Evidence From Bilingual Children’s Acquisition of Object Pronouns

In this study, we tested the predictions of 2 opposing perspectives on the nature of the deficit in specific language impairment (SLI): the domain-general, cognitive/ perceptual processing view and the domain-specific, linguistic representational view. Data consisted of spontaneous speech samples from French–English bilingual children with SLI; younger, typically developing, bilingual language peers, and monolingual French comparison groups. We analyzed the children’s use of direct object clitics/pronouns and definite articles in French and English. The bilingual children had more difficulty with clitics in French than articles in French and pronouns in English; and bilingual children with SLI performed like their younger, unaffected bilingual peers and like monolinguals with SLI. We argue that these findings present challenges to the domain-general perspective and support the claim that domain-specific limitations in linguistic representation are a component of SLI.