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09/08/1910 Swiss psychologist Jean Piaget is born

He is famous for his theory of cognitive development. It describes how human thinking develops from early age to adulthood. As small children, we are not capable of abstract thinking. Piaget described four distinctive stages of human cognition. His theory is still in use in education and many other areas.


  • Essentials 

  • Personal life 

  • Career history 

  • Theory 

  • Research methods 

  • Influence 

  • Challenges 

  • List of major achievements 

  • List of major works