Teasing apart factors influencing Executive Function performance in bilinguals and monolinguals at different ages

This study attempts to tease apart a variety of factors that may contribute to performance on executive function tasks. Data from the Simon task is re-examined to determine the contributions of age, SES, language proficiency/vocabulary, general cognitive performance, and bilingualism on performance. The results suggest influence from a variety of factors, with a major contribution from relative age and from language proficiency, as measured by vocabulary. Bilingualism showed some effect in relation to older adults' accuracy of performance, in both congruent and incongruent conditions, but not to reaction time.