“…Over a third of the studies published, this last decade relies on multiple informants (self-reports, parent, peer, teacher, or school reports), and includes in the design an assessment of multiculturalism ideology at national and school levels (e.g., Brown & Chu, 2012;Sam, 2018), and nonimmigrants' attitudes toward outgroups or immigrants and refugees in particular (e.g., Beißert, G€ on€ ultas ß, & Mulvey, 2020;Gr€ utter & Tropp, 2018). Data are often analyzed through the use of multilevel models to account for the nestedness of individuals in schools, communities, or countries, and to examine the effect of higher-level contextual variables on immigrant youth adaptation (e.g., Leventhal & Shuey, 2014;Zimmerman & Farrell, 2017).…”