Abstract

The purpose of this study was to develop a short form of the Self-Concept and Identity Measure (Kaufman et al., 2015). The 27-item Self-Concept and Identity Measure was developed to assess different aspects of identity through three subscales: Consolidated Identity, Disturbed Identity, and Lack of Identity. However, despite being used in many recent studies, the scale has been found to have problematic psychometric properties, and we decided to create a 12-item shortened scale by deleting problematic items. In three studies, we compared the model fit of the original scale and the shortened scale, and also compared the model fit between the two-factor model proposed by Lim et al. (2022) and the shortened three-factor model proposed in this study. The results showed that the shortened three-factor scale had good model fit, and the three subscales correlated with variables such as psychological well-being, life satisfaction, dimensions of identity development, depression, and personality disorders in the direction predicted by theory.