The relationships between balanced-bilingual proficiency, executive function, and rational thinking: a dissociative finding

Abstract

ABSTRACT The cognitive advantages of bilingualism have accumulated significant support in various domains, and executive function is suggested to be one of their operative mechanisms. However, empirical evidence of the relationships among bilingualism, executive function, and rational thinking is still lacking. The present study extends this understanding. With a refined operational definition of bilingualism and by controlling for possible confounding variables, we recruited 114 university participants to perform a balanced bilingual proficiency task; a modified Simon executive function (EF) task (to assess inhibition and updating components of EFs); a syllogism task; a critical thinking test; and measures of intelligence, socioeconomic status (SES), and the openness-to-experience personality trait. The results showed that balanced bilingual proficiency positively and robustly predicted participants’ performance in syllogism and critical thinking tasks after we controlled for other variables. The relationships between EF components and rational thinking showed a dissociative result: Inhibition and updating ability contributed to syllogistic and critical thinking differently. These results shed further light on the educational application needs of bilingual learning and concluded in a discussion of future investigations of the theoretical accounts and mechanisms of bilingual advantages.