Piaget's stage theory of cognitive development suggests that a child's thinking is fundamentally different--more advanced--in every stage than it was on the previous stage. This demonstrates the concept of Qualitative change.
According to Jean Piaget's theory of cognitive development, children's intelligence evolves with age. A kid's cognitive growth involves more than just knowledge acquisition; the youngster also needs to create or develop a mental model of the world.
Every stage of development involves a particular sort of intelligence, with the child's thinking being qualitatively distinct from the others at each stage. It suggests discrete stages of growth rather than a steady rise in the quantity and complexity of actions, conceptions, ideas, etc., which are defined by qualitative differences.
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