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Two Languages, One Brain
psychology of bilingualismFor several decades, researchers have debated whether speaking two languages improves mental skills, such as the ability to ignore distractions and switch between tasks. Some early studies reported clear advantages for bilingual children, later research, using much larger samples, has often failed to find any difference. Many scientists now suspect that the original findings were by small sample sizes or by differences between the groups being compared. Whatever the outcome of this debate, the practical benefits of knowing a second language, from travel to employment, are not in .