In all three age groups, when kids watched an actual person doing the action, some of them were able to replicate it a day later. The video demonstration was much less successful—the twelve-month-olds learned nothing, and the older kids learned much less than from seeing a live person do it. Another example is a study where researchers tried to use a DVD recording to maintain exposure to non-native sounds. At birth, children are able to learn the sounds from any language, but as they age, they specialize in the sounds they hear regularly. Researchers tried to maintain exposure of
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