About the study: Bergelson, Elika and Daniel Swingley, "6- to 9-Month-Olds Understand the Meaning of Many Spoken Words," February 13, 2012, "Proceedings of the National Academy of Sciences." The study tested 33 six-to-nine-month-olds and 50 children from 10 to 20 months completed the same tests to see how their abilities compared with the younger group.
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