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This is Scientific American 60-Second Mind, I'm Christie Nicholson. Got a minute?

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When babies learn to talk, they pay close attention to grammar.

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Specifically verbs.

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A new study shows that hearing what an object does is how they learn what an object is.

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Researchers showed infants between 15 and 19 months of age pairs of images on a screen.

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Each pair included an animal and a non-living object.

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Then the screen went dark and the infants overheard a conversation that included a nonsense word: 'blick."

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Some babies heard a sentence with an action verb like, "The blick eats."

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Others heard a sentence like "The blick is over here," with no action verb.

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The infants then again saw the screen with an animal and an inanimate object.

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And a researcher said, "Look at the blick."

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Infants who had heard the active sentence looked more often and longer at the animal, compared with those who had heard the sentence lacking any action.

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Because if all the babies know is that "the blick is over here," it could be any object, alive or not.

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The study is in the journal Cognition.

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The researchers say that learning language requires the infant to listen to natural conversations and to analyze the complex situations being discussed.

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Such as why the blick forgot to pick up the mooshlik on the way home from work.

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Thanks for the minute, for Scientific American 60-Second Mind. I'm Christie Nicholson.

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