Erik Erikson Stages Chart. Sacco1 1 school of behavioral and health sciences, northcentral university, arizona, usa. He is also credited with formulating the concept of the adolescent identity crisis.
Like freud and many others, erik erikson maintained that personality develops in a predetermined order, and builds upon each previous stage. Stages up to the age of 18 years and three further stages beyond, well into adulthood. He coined the phrase identity crisis.