“…Passive consent was obtained from the parents. The questionnaire included items for the study variables (peer victimization, the attribution to discrimination, ethnic identification, global self-esteem, and emotional problems) but also items for children's relationship with their main teacher, peer acceptance, hyperactivity/inattention, children's attitudes toward cultural diversity, and the perceived multicultural norms of their teacher (Thijs, Westhof, & Koomen, 2012). Originally the sample consisted of 403 children, for whom the pattern of missing values on our measures of peer victimization, ethnic identification (4.5% missing), global self-esteem (1.2% missing), and emotional problems (2.2% missing) was not significantly different from completely at random: Little's MCAR test, χ 2 (16) ¼ 15.43, p ¼ .49.…”