Abstract
<title>Abstract</title> <p>This study evaluated the psychometric properties of the Persian Utrecht‑Management of Identity Commitments Scale (U‑MICS) in 778 Iranians (50.5% female; age 10–53 years, M=16.53, SD=4.30). Participants completed the U‑MICS (educational and relational domains), DIDS, Rosenberg Self‑Esteem Scale, and Children's Depression Inventory. Confirmatory factor analysis, bifactor modeling, measurement invariance (gender, mother tongue, age), and Item Response Theory were applied. The three‑factor model (commitment, in‑depth exploration, reconsideration) showed acceptable fit (educational: CFI=0.923, RMSEA=0.098, SRMR=0.082; relational: CFI=0.939, RMSEA=0.092, SRMR=0.068). The bifactor model fit best; a general identity factor explained 60–64% of common variance, with reconsideration as the most distinct factor (ωH=0.826). Partial metric but full scalar invariance was supported for educational identity across gender; full invariance held for relational identity across all groups. Convergent validity was shown by correlations with DIDS and self‑esteem (e.g., educational commitment with self‑esteem: r=0.431); divergent validity by negative associations with depression. Internal consistency was acceptable to excellent (α=0.796–0.927; ω=0.790–0.927). IRT revealed high discrimination parameters (e.g., u13, a=3.845–4.544) and ordered thresholds. The Persian U‑MICS is a psychometrically sound instrument for assessing identity formation across a wide age range in Iran.</p>