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When a baby is startled by a loud noise or me meet, they will extend his or her legs, throw the arms back, cry, then pull the arms and legs back in.
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When the corner of a baby's mouth is stroked, the baby will turn his or her head or open his or her mouth in order to follow the direction of the stroking.
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When the roof of the baby's mouth is touched, the baby will suck.
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An infant's clinging response to a touch on the palm of his or her hand.
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When a baby's head is turned to one side, the arm on that side stretches out and the opposite arm bends up at the elbow.
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Infants under 6 months seemed unafraid when approaching what seemed to be a drop off they would fall off of. Less perceptual ability than older infants.
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Babbling
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Raise head to 45 degrees
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Sit with support
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Sit without support
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Infants 6 months to 1 year refused to climb over the cliff, and got nervous. These infants had explored the world more and knew that drop offs were dangerous. They had more perceptual ability than the younger infants.
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Babbling turns into words. Infant masters sounds of own language and usually says his or her first word.
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Walk holding on to furniture
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Walk