Children often show a positive ingroup bias in altruistic behaviors such as sharing. Insight in factors related to ethnic bias in sharing can help towards understanding the origins of inequality in the distribution of resources in society. The present study examined the effect of priming secure attachment (versus positive affect) and multiculturalism (versus color-evasiveness) on ingroup bias in dominant ethnic group children's altruistic sharing. One hundred twenty-five White Dutch children (45 % boys, 55 % girls) between 7 and 11 years old (M_age = 8.47, SD_age = 0.87) participated in a Dictator game after being primed. The Dictator game was played against three same-gender children with different ethnic backgrounds (White, Black, Middle Eastern). Results support the idea that priming secure attachment and multiculturalism can decrease ingroup bias in dominant ethnic group children's altruistic sharing, although the effects do not strengthen each other and are effective in situations with different trade-offs and interaction partners. Future research is needed to disentangle the effectiveness of secure attachment and multiculturalism messages in different sharing situations and with interaction partners with different ethnic backgrounds. Results from the present study provide starting points from which to further examine which messages potentially positively impact children's interethnic relations.

孩子们经常在分享等利他行为中表现出积极的群体偏见。洞察共享中与种族偏见相关的因素有助于理解社会资源分配不平等的根源。本研究检验了启动安全依恋（相对于积极影响）和多元文化主义（相对于回避颜色）对主导种族儿童利他分享中的内群体偏见的影响。125 名 7 至 11 岁的荷兰白人儿童（45% 男孩，55% 女孩）（M_年龄 = 8.47，SD_年龄 = 0.87）在准备好后参加了独裁者游戏。独裁者游戏是针对三个具有不同种族背景（白人、黑人、中东）的同性别儿童进行的。结果支持这样的观点，即启动安全依恋和多元文化可以减少主导种族儿童的利他分享中的群体偏见，尽管这些效果不会相互加强，并且在具有不同权衡和互动伙伴的情况下是有效的。未来的研究需要解开安全依恋和多元文化信息在不同共享情况下以及与具有不同种族背景的互动伙伴的有效性。本研究的结果提供了进一步检验哪些信息可能对儿童的