Type of bilingualism, task domain, and attention demands impact children's cognitive performance.

The present study investigated the relation between continuous measures of two qualitatively different types of bilingual experience and outcome measures that varied in domain (verbal or nonverbal) and processing demands (degree of conflict). Participants were 195 English-speaking children, 7 years old, who were enrolled in French immersion programs. Children were assessed for their degree of "home bilingualism," reflecting language use patterns at home, and "school bilingualism," reflecting progress in learning French. None of the children spoke French at home. Participants completed verbal fluency, n -back, and global-local tasks, with conditions within tasks varying in degree of attentional processing required. Type of bilingual experience affected verbal and nonverbal tasks differently. Home bilingualism was positively associated with performance on attentionally demanding conditions of the n-back and global-local tasks, the two nonverbal tasks, whereas school bilingualism was positively associated with performance on English verbal fluency, the linguistic task. In both cases, results were modulated by the degree of bilingual experience. These results underline the importance of specifying the type and degree of bilingual experience and the details of the outcome tasks to understand the impact of bilingualism on children's development. (PsycInfo Database Record (c) 2024 APA, all rights reserved).