WASHINGTON - Babies do not learn to talk solely from hearing sounds. New research suggests they are lip-readers too.
It happens during that stage when a baby’s babbling gradually changes into syllables and eventually into that first “mama’’ or “dada.’’
Florida scientists discovered that starting around age 6 months, babies begin shifting from the intent eye gaze of early infancy to studying mouths when people talk to them.
“The baby in order to imitate you has to figure out how to shape their lips to make that particular sound they’re hearing,’’ explained developmental psychologist David Lewkowicz of Florida Atlantic University, who led the study published yesterday. “It’s an incredibly complex process.’’
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Apparently it doesn’t take them too long to absorb the movements that match basic sounds. By their first birthdays, babies start shifting back to look you in the eye again.
“It’s a pretty intriguing finding,’’ said University of Iowa psychology professor Bob McMurray, who also studies speech development. The babies “know what they need to know about, and they’re able to deploy their attention to what’s important at that point in development.’’
The new research appears in this week’s issue of the Proceedings of the National Academy of Sciences.
It offers more evidence that quality face-time with your tot is very important for speech development - more than, say, turning on the latest baby DVD.
It also begs the question of whether babies who turn out to have developmental disorders, including autism, learn to speak the same way, or if they show differences that might provide an early warning sign.