A CHART OF COMPARED THEORIES Click on the links below to view the comparative chart of psychological development theories by Margaret Mahler, John Bowlby, Sigmund Freud, Erik Erikson, Jean Piaget and Carl Jung. 1-5 months 6-11 months 12-17 months 18-23 months 2-7 years 8 years – adolescence adulthood – old age READINGS TO GUIDE PARENTING … Continue reading STAGES OF DEVELOPMENT