This study examined whether or not the Erikson Psychosocial Stage Inventory (EPSI) measured the hierarchical model of development proposed by Erikson. Over 1000 college students responded to the inventory. Using the simplex pattern, the EPSI did not measure Erikson's stages for this sample of students. An examination of the EPSI for subgroups by race and gender did not yield positive results. Possible explanations of the findings are included.
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