The Assessment of Identity Development in Adolescence (AIDA) Questionnaire: First Psychometric Evaluation in Two North American Samples of Young People.

The Assessment of Identity Development in Adolescence (AIDA) is a recently developed measure of identity diffusion in young people. Originally validated in Switzerland, the English version has not yet been validated. Our aim was to evaluate the AIDA's internal factor structure, internal consistency, incremental validity, and relations to other variables in adolescents and young adults and derive clinical cutoffs for use in clinical settings.