Study: Babies try lip-reading in learning to talk
WASHINGTON -- Babies don't learn to talk just from hearing sounds. New research suggests they're lip-readers, too.
It happens during that magical stage when a baby's babbling gradually changes from gibberish 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.