In 2015 we recruited a cohort of school-age children in Montréal, who were autistic or typically developing, and were exposed to different amounts of French, the majority language in Québec. We conducted a 8-year follow-up study with this cohort in adolescence, stay tuned for our findings on their development!
Children on the autism spectrum often experiences language delays. In this context, it is a common belief that bilingualism may be too challenging for them and may harm their language development. We examined whether proficient bilingualism is possible in school-age children with autism growing up in Montreal, by assessing their language skills as well as by examining the relationship between amount of exposure to a language and skills in that language. Our findings demonstrate that proficient bilingualism is possible for some children on the autism spectrum, provided adequate exposure to the two languages. The amount of exposure to a language has a strong, positive relationship with a child's vocabulary and morphological skills in that language at school-age, as it does in typical development.
Children with autism demonstrate significant challenges with executive function (EF). Better performance on some executive functions has sometimes been reported in typically-developing bilingual children relative to monolinguals. We hypothesized that proficient bilingualism may alleviate EF impairments in autism, and tested this using verbal and non-verbal tasks. In both cases, proficient bilinguals with autism outperformed well-matched monolinguals with autism. These findings build on previous research demonstrating that bilingualism is not detrimental for language development in autism. Moreover, they provide novel evidence indicating that bilingualism may even hold benefits with respect to mitigating some executive function impairments in this population.