Psychology / Unit 8 Psych 0949 short lesson, about 20 seconds
When Two Piagetian Tasks Disagree
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The idea
When two tasks place the same child at different stages, the disagreement is reported rather than resolved by choosing the higher result.
In practice
A child conserves number and fails conservation of volume in the same session.
Where people slip
Conservation arrives at different ages for number, mass, and volume. A single stage label hides that.
Your place on the trail
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