Supplementary materials for: Examining the psychometric properties of the BIIS-2 in ethnic minority adolescents in Germany - Journal of Psychological Test Adaptation and Development

Understanding how adolescents integrate multiple cultures into their identity is a growing field of research in modern multicultural societies and requires psychometrically sound assessments tools. The Bicultural Identity Integration framework together with the Bicultural Identity Integration Scale 2 (BIIS-2; Huynh et al., 2018) offers an instrument that allows assessing BII with two factors (Blendedness vs. Compartmentalization and Harmony vs. Conflict). However, the psychometric properties of the BIIS-2 remain inconclusive for multicultural youth in Germany. To address this gap, we examined the psychometric properties of the BIIS-2 in a sample comprising 595 diverse ethnic minority adolescents in Germany (Mage = 13.26, SD = 1.3; 45.6% female). Contrary to the proposed two-factor structure (Huynh et al., 2018), our findings provide evidence for a four-factor structure (Blendedness, Compartmentalization, Harmony, and Conflict) which is also supported through unique associations in validation results. Supplementary materials for: Duwe, P., & Titzmann, P. F. (2024). Examining the Psychometric Properties of the BIIS-2 in Ethnic Minority Adolescents in Germany. Psychological Test Adaptation and Development, 5, 251–262. https://doi.org/10.1027/2698-1866/a000081 This research was supported by funds from the program “Niedersächsisches Vorab” made available by the Ministry for Science and Culture in Lower Saxony, Germany [grant number 76202-17-9/17]. The publication of this article was funded by the Open Access Fund of Leibniz University Hannover, Germany. unknown unknown