Human Growth and Development / Unit 4 HGD 0477 short lesson, about 20 seconds
Smiles and Imitation
Captions available
The idea
The social smile, smiling at a smiling face, appears around two months; deliberate imitation of others' actions develops at eight to twelve months.
In practice
A ten-month-old copying a parent's wave, and later waving at a stranger unprompted.
Where people slip
Infants can also imitate actions seen days earlier, deferred imitation, an ability unit three placed in the sensorimotor stage.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
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