Eriksons highly influential eight-stage theory of development also expanded Freuds original five stages to encompass the years of life after early childhood. In 1950 Erik Erikson proposed a theory of psychosocial development that described eight stages by which a person. The Psychosocial Theories Of Erik Erikson A Basic Understanding Stages Of Psychosocial Development Erickson Stages Of Development Eriksons Stages Of Development The Eight Stages of Development. . One of the most popular is Erik Eriksons stages of psychosocial development. While his theory was impacted by psychoanalyst Sigmund Freuds. Erik Erikson was an ego psychologist who developed one of the most popular and influential theories of development. Erik Erikson was born in 1902 to a single mother with the identity of his father unknown. Many models and theories have been applied to human development. Eriksons theory is based on eight stages of development i...