The development of in-group-favoring math stereotypes among adolescents across gender and race/ethnicity: Teacher influence and motivational consequences.

= 0.63 in nineth grade), we found that Asian and White girls' female-favoring math stereotypes and their perceived math teacher support reinforced one another from early to late adolescence, but not among other groups. In-group-favoring math stereotypes positively predicted math motivational beliefs among boys across all racial/ethnic groups, but only among Black and White girls. These stereotypes indirectly predicted math grade point average (GPA) via motivational beliefs only for White adolescents. Findings suggest that gender differences in the development of in-group-favoring math stereotypes and the benefits of stereotype lift are not the same across race/ethnicity. Rather, gender norms that vary across different racial/ethnic groups may shape who develops and benefits from in-group-favoring math stereotypes, underscoring the need to consider intersectionality to better capture motivational processes in real-world contexts. (PsycInfo Database Record (c) 2026 APA, all rights reserved).