Multiculturalism and tolerance, as two sets of normative beliefs about how to deal with intergroup diversity, have been recognized as effective at reducing outgroup negativity among majority group members. However, whether majority group members' normative beliefs regarding them might motivate their solidarity-based collective actions and how their political ideology might qualify this influence remained unclear. To answer these questions, we conducted two pre-registered experimental studies (N = 626), both zooming in on the multiculturalism issues in the context of the relationships between native Dutch citizens and citizens with a Moroccan background within Dutch university campuses (Study 1) and broader Dutch society (Study 2). In both studies, we found an ingroup norm of tolerance (vs. control) undermined majority group members' engagement in collective actions in support of ethnic minorities. Additionally, ideological leftists were more sensitive to norms than rightists: Study 1 showed a facilitative effect of the multiculturalism norm (vs. control) on solidarity-based collective action intentions particularly among leftists, whilst Study 2 revealed a dampening effect of the tolerance norm (vs. control) on these intentions particularly among leftists.

中文翻译：

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多元文化主义（和宽容）的内群体规范如何影响群体间团结：意识形态的作用。


多元文化主义和宽容作为关于如何处理群体间多样性的两套规范性信念，已被公认为可以有效地减少多数群体成员的外群体消极情绪。然而，多数群体成员对他们的规范性信念是否会激励他们基于团结的集体行动，以及他们的政治意识形态如何限定这种影响，目前尚不清楚。为了回答这些问题，我们进行了两项预先注册的实验研究 （N = 626），两者都在荷兰本土公民与荷兰大学校园（研究 1）和更广泛的荷兰社会（研究 2）中具有摩洛哥背景的公民之间的关系背景下放大了多元文化主义问题。在这两项研究中，我们发现内群体容忍规范（与控制相比）破坏了多数群体成员参与支持少数族裔的集体行动。此外，意识形态左派比右派对规范更敏感：研究 1 显示多元文化主义规范（相对于控制）对基于团结的集体行动意图的促进作用，尤其是在左翼分子中，而研究 2 揭示了容忍规范（相对于控制）对这些意图的抑制作用，尤其是在左翼分子中。