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Abstract ▼ AI-Helper

Piaget developed his own psycho-logic of groupings and groups. Attacks came from logicians and psychologists. They say that Piaget’s logic is wrong and should be replaced by modal logic or dialectical logic. I am quite willing to accept this accusation. But I emphasize that Piaget’s logical notion...

Piaget developed his own psycho-logic of groupings and groups. Attacks came from logicians and psychologists. They say that Piaget’s logic is wrong and should be replaced by modal logic or dialectical logic. I am quite willing to accept this accusation. But I emphasize that Piaget’s logical notions are half-way between logic and psychology and are useful because they show elementary structures of the subject and allow us to find relations between these structures and more advanced groups and lattices. Furthermore, nowadays even mathematicians have an interest in imperfect structures like groupo？s. The object’s permanent character reults from the organization of the spatial field which is brought about by the coordination of the child’s movements. Such movements are characterized by reversibility and associativity. The permanent object is therefore an invariant constructed by means of such a group in the pre-operational stage.

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