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When Two Piagetian Tasks Disagree

This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.

State

When two tasks place the same child at different stages, the disagreement is reported rather than resolved by choosing the higher result.

Show

A child conserves number and fails conservation of volume in the same session.

Watch for

Conservation arrives at different ages for number, mass, and volume. A single stage label hides that.