Validation of the Slovene Functions of Identity Scale with a sample of emerging adults

The Function of Identity Scale (FIS) is a self-report measure of five identity functions: structure, harmony, goals, control, and future. The purpose of the study was to examine the psychometric properties of the Slovenian version on a sample of emerging adults. 287 participants between the ages of 18 and 29 years participated in the study. Confirmatory factor analysis provided support for the proposed five-factor structure of the scale. Furthermore, strict measurement invariance across genders was demonstrated. Convergent validity was only partially established. With the exception of the Control subscale, the internal reliability coefficients were satisfactory for the other four subscales. Shortcomings of the Control subscale were discussed along with recommendations for future revisions. Overall, the results of the study are consistent with those observed in other validation studies and support the usefulness of the scale for assessing the identity functions among emerging adults.