A comparison of two measures of ego identity in high school adolescents.

A sample of 279 male and female high school seniors participated in a study on ego identity and personality structure. The adolescents completed the Constantinople Inventory of Psychosocial Development (IPD) and, on the basis of the principal components method of factor analysis, were found to group on three factors: Adolescent Identified, Industry Crisis, and Unresolved Crisis. A further subsample of 86 adolescents also completed the Rasmussen Ego Identity Scale (EIS). Comparisons of the two instruments yielded significant positive relationships on subscales, but indicated differential sources of identity scores and resultant possible misclassification of subjects through the use of a single identity score measure.