Human Growth and Development / Unit 18 HGD 2556 short lesson, about 20 seconds
Piaget's Critics
Captions available
The idea
Each Piaget unit carried a critique: infants show object permanence earlier than he thought, entry 0352; the order holds but ages vary by culture, entry 0916; and formal operations are not universal, entry 1243.
In practice
A preschooler passing a conservation task before Piaget's predicted age, entry 0917.
Where people slip
The criticisms qualify the timing and universality of the stages, not the sequence itself.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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