Does long-term dual-language immersion affect children's executive functioning?

Dual-language immersion (DLI) experience has been linked to enhanced reading and math skills in minority- and majority-language elementary school children. However, it remains unclear whether DLI experience can also enhance executive functioning. The current study took a longitudinal approach to this question and examined the effect of DLI experience on the development of executive function skills in majority-language children over a 1-year period. In total, 33 monolingual children attending English-only classrooms (Mage = 9.17 years, SD = 1.03) and 33 English-Spanish bilingual children attending DLI classrooms (Mage = 9.27 years, SD = 0.94) matched on age, gender, nonverbal IQ, and socioeconomic status were tested twice, 1 year apart, on nonverbal measures of inhibition, shifting, switching, and monitoring. Results revealed a significant interaction between group and year only on the response inhibition task, with bilinguals showing superior inhibition in Year 1 but not in Year 2. The two groups performed equivalently on all other measures at both time points. Results suggest that classroom DLI has a minimal impact on executive functions, at least as tested in the current study.