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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.
Piaget was one of the influential early psychologists to study the development of cognitive abilities. His theory suggests that development proceeds through a set of stages from infancy to adulthood and that there is an end point or goal.evelopmental psychology is the scientific study of how and why human beings change over the course of their life.