Functions of Identity: Scale Construction and Validation

The purpose of this study was to construct a reliable indicator of the 5 functions of identity proposed by Adams and Marshall (1996). Following Loevinger’s (1957) method of test construction, 2 related studies were completed to test the substantive, structural, and external validity of the Functions of Identity Scale. Study 1 provides support for the substantive validity (factor structure, internal consistency, and construct validity). Results of Study 2 reveal evidence for 4 functions of identity and support for the external validity of the scale. As predicted, the complexity of identity status (diffusion, foreclosure, moratorium, and achievement) was positively correlated with the functions of identity, except for the measure of harmonious goals. These findings also support the conceptualization of the process of identity formation based on the distinctions of active and passive identity. Passive identity (diffusion and foreclosure) was associated with lower scores on the Functions of Identity Scale than was active identity (moratorium and achievement).