By -
Philip Harman
Piaget’s theory argues that we have to conquer 4 stages of cognitive development: 1. Sensori-Motor Stage 2. Pre-Operational Stage 3. Concrete Operational Stage 4. Formal Operational Stage Only once we have gone through all the stages, at what age can vary, we are able to reach full human intelligence. Special thanks for our patroeon supporters: Ville Medeiros, Chutimon Nuangnit, Cedric