A teacher displays two identical glasses filled with equal amounts of juice. She empties them into two different glasses, one long and the other wide. She asks the children to identify the glass that contains more juice. Children respond that tall glass has more juice. The teacher’s children have ………….. difficulty.

While Piaget related cognitive development to biological development, Kohlberg related moral development to socialisation with family, teachers etc. Piaget and Vygotsky - Both of them said that children build knowledge through experiences in life.