From trust on intimacy: A new inventory for examining erikson's stages of psychosocial development. 
A new inventory for examining the first six of Erikson's psychosocial stages is described.  The self-report questionnaire, developed in a pilot study of 97 adolescents and tested in a study of 622 adolescents, has 12 items for each subscale.  Measures of reliability and validity are reported.  It is concluded that the Erikson Psychosocial Stage Inventory (EPSI) is a useful measure for researchers interested in development from early adolescence and in mapping changes as a function of life events.