Human Growth and Development / Unit 3 HGD 0349 short lesson, about 20 seconds
The First Three Substages
Captions available
The idea
Piaget's sensorimotor stage begins with simple reflexes, then primary circular reactions with the body, then secondary circular reactions with objects.
In practice
Sucking adapted to a bottle, then thumb-sucking repeated, then a rattle shaken again and again.
Where people slip
Circular means repeated: an action that happens by chance and is interesting enough to repeat, first with the body, then with objects.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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