Ethnic-racial identity (ERI) formation is an important developmental task. Although families are a primary context for ERI socialization, little is known about siblings' role. Accordingly, we applied the Actor-Partner Interdependence Model to longitudinal data from 2 siblings to examine the links between siblings' ERI exploration, resolution, and affirmation. Participants were Mexican-origin mothers, fathers, and 2 siblings (older siblings Mage = 20.65 years; younger siblings Mage = 17.72 years) from 246 families in Arizona who were interviewed on 2 occasions across 2 years. Siblings' ERI exploration in late adolescence positively predicted young adult ERI, accounting for mothers' and fathers' ERIs. For resolution, the sibling (i.e., partner) effect was moderated by sibling gender constellation, such that the sibling effect emerged only for same-sex dyads. For affirmation, the sibling effect emerged for older but not younger siblings. These findings highlight the need to understand siblings' role in ERI and to expand research on family socialization of ERI beyond parents. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

中文翻译：

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墨西哥裔青年的种族认同发展：兄弟姐妹的角色。

民族-种族认同 (ERI) 的形成是一项重要的发展任务。尽管家庭是 ERI 社会化的主要背景，但对兄弟姐妹的作用知之甚少。因此，我们将 Actor-Partner 相互依赖模型应用于来自 2 个兄弟姐妹的纵向数据，以检查兄弟姐妹的 ERI 探索、解决和肯定之间的联系。参与者是来自亚利桑那州 246 个家庭的墨西哥裔母亲、父亲和 2 个兄弟姐妹（哥哥姐姐 Mage = 20.65 岁；弟弟妹妹 Mage = 17.72 岁），他们在 2 年内接受了 2 次采访。兄弟姐妹在青春期后期的 ERI 探索正向预测年轻成人 ERI，占母亲和父亲的 ERI。为了解决，兄弟姐妹（即伴侣）效应由兄弟姐妹性别星座调节，这样，兄弟姐妹效应只出现在同性伴侣身上。肯定的是，兄弟姐妹效应出现在年长而不是年幼的兄弟姐妹身上。这些发现强调需要了解兄弟姐妹在 ERI 中的作用，并将 ERI 的家庭社会化研究扩展到父母之外。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。