Erikson, Freud, and Piaget.   

Age group is Infancy = birth -2 year,  preschool = 2-6, middle childhood= 6-12, Adolescence= 12-18, Emerging adulthood= 18-25, early adulthood= 25- 40, middle adulthood= 40-65, late Erikson, Freud, and Piaget.   

 

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