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Morality- Piaget. Jean Piaget was a Swiss Psychologist who studied childhood development and how children develop morality. Through studying children and how they related to the rules of games that they played where he lived, he developed the idea that children move through two stages of morality. Piaget calls the first stage heteronymous morality.
This includes thought, judgment, and knowledge. The stages were named after psychologist and developmental biologist Jean Piaget, who recorded the intellectual development and abilities of infants, children, and teens. Piaget's four stages of intellectual (or cognitive) development are: 1  Sensorimotor. Birth through ages 18-24 months. 2  Preoperational. Toddlerhood (18-24 months) through early childhood (age 7) 3  Concrete operational. Ages 7 to 12.  Formal operational. Adolescence through adulthood.