Language proficiency does not modulate executive control in older bilinguals
Mishra, Ramesh Kumar
Prasad, Seema Gorur
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Ramesh Kumar Mishra, Manasa Padmanabhuni, Pratik Bhandari, Shiji Viswambharan & Seema Gorur Prasad (2019) Language proficiency does not modulate executive control in older bilinguals, Aging, Neuropsychology, and Cognition, 26:6, 920-951, DOI: 10.1080/13825585.2018.1562029
We examined if language proficiency modulates performance in tasks that measure executive control in older Telugu-English bilinguals (n = 50, mean age = 57.15 years). We administered numerical Stroop task, Attention Network Task, Dimensional Change Card Sorting task, and stop-signal task that are known to tap into different aspects of executive functioning on healthy aging Telugu-English bilinguals. Second language (English) proficiency was calculated as a cumulative score that considered both subjective and objective measures of L2 fluency and use. Bilinguals were divided into two groups based on the cumulative score and compared on each task. We did not find any effect of language proficiency on any of the executive control measures. The additional Bayesian analysis also supported these findings. Therefore, the results do not support the claim that bilingual language proficiency modulates executive control, at least in the elderly population. We discuss the results with regard to the issue of bilingual advantage in executive control and the role of age and language use.