Factor-analytic structures in the English and Japanese versions of the Objective Measure of Ego-Identity Status (OMEIS)

This research describes an exploratory factor analysis for the purposes of factorial validation for both the English and Japanese versions of the Objective Measure of Ego-Identity Status (OMEIS)—Ideological version (Adams, Bennion, & Huh, 1989). The Japanese OMEIS is a direct translation of the English OMEIS (Ohnishi, 1998). The study reports the factor structure of the OMEIS—Ideological version in English and Japanese. A principal factor analysis (PFA) with both oblique and orthogonal solutions was performed. Alpha reliabilities for the factors are presented. The present research compares and contrasts the factor structures of OMEIS—Ideological version, derived from a U.S. sample and a Japanese sample, comprising women from late adulthood to middle age. Cultural differences between the two sample populations are explored.