How bilingualism affects cognitive and linguistic skills in children with developmental language disorders

This study examined the linguistic and cognitive characteristics of two groups of Italian preschoolers with developmental language disorder (DLD): one group of monolingual Italian speakers and another of Italian-Slovenian bilinguals. The assessment focused on executive functions (EFs) (i.e., phonological working memory and inhibitory control) and linguistic abilities, which involved a multilevel analysis of discourse production. The bilingual group outperformed the monolingual group on tasks measuring EFs. While the two groups showed similar performance across several linguistic measures, the bilingual children demonstrated superior grammatical comprehension, albeit with high variability. A similar level of variability was observed in the bilingual group’s phonological discrimination abilities. Both grammatical comprehension and phonological discrimination were significantly correlated with EFs. These findings are discussed in the context of current theories of linguistic development in bilingual children with DLD.