The researchers selected 16 11-month-old children, eight of whom came from monolingual families and eight from Spanish-speaking, English-speaking families  Each child listens to an audio that is about 18 minutes long, both in English and Spanish
Children growing up in bilingual families can master bilingualism without their parents' deliberate teaching
 Using brain magnetic records, the researchers found that in the executive regions of the brain, bilingual families, older children, responded more strongly to verbal vocal stimuli than children from monolingual families