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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's Stages of Cognitive Development. Jean Piaget was a developmental psychologist best known for his theory of cognitive development. Piaget's stages deal with the nature of knowledge (epistemology) and how humans come to gradually acquire it.See also: Erikson Stages.iaget's Stages of Cognitive Development. Jean Piaget was a developmental psychologist best known for his theory of cognitive development. Piaget's stages deal with the nature of knowledge (epistemology) and how humans come to gradually acquire it. See also: Erikson Stages.