How did Jean Piaget redefine knowledge?
Piaget redefined knowledge by determining that (1) knowledge is developed in four invariant, hierarchical and universal stages and (2) children are not cognitively able to perform some tasks of logic and deduction, which academic opinion assumed they could perform, until they reached age 11 or older. The first stage is infancy to two years of age. The second stage is two years of age to seven years of age. The third stage is between seven years of age and eleven years. The fourth and last stage begins at eleven years of age or older and continues until after adolescence. The first stage (0 – 2 years old) is the sensorimotor development stage in which the infant is believed to understand the world only through physical actions within or upon the physical world. Actions in stage one are founded upon inborn instincts that are utilized in expanded tasks. The second stage (2 -7 years old) is the perceptual or intuitive stage which follows language acquisition and in which events are believe
