For the study, Lewkowicz and doctoral student Amy Hansen-Tift tested nearly 180 babies at ages 4, 6, 8, 10 and 12 months by showing videos of a woman speaking in English or Spanish to the babies. All the babies were born to English-speaking parents. A gadget mounted on a soft headband tracked where
So he and doctoral student Amy Hansen-Tift tested nearly 180 babies, groups of them at ages 4, 6, 8, 10 and 12 months.They showed videos of a woman speaking in English or Spanish to babies of English speakers. A gadget mounted on a soft headband tracked where each baby was focusing his or her gaze a