Preventing prejudice and improving intergroup attitudes: A meta-analysis of child and adolescent training programs

This article reports the results of a meta-analysis of 81 research reports containing 122 intervention–control comparisons of structured programs to reduce prejudice or promote positive intergroup attitudes in children and adolescents. Overall, the analysis revealed a mean effect size of d = 0.30, indicating low to moderate intervention effects. From the great variety of different approaches, interventions based on direct contact experiences...