The identification-prejudice link describes the defensive stance toward immigrants held by strong national identifiers. Recent research refined this relationship by suggesting that defensive national identification (operationalized through national narcissism), but not secure national identification, was associated with prejudice. While previous research found intergroup threat and conspiracy beliefs to mediate the identification-prejudice link, the need to comprehensively and experimentally test the role of these defensive group beliefs remains in the context of the narcissistic identification-prejudice link. Furthermore, following the group-based control model, we proposed that these defensive group beliefs might be more pronounced among national narcissists compensating for a low personal control. In Study 1 (N = 1104, nationally representative sample), national narcissism, but not secure national identification, was related to prejudice against immigrants, and a serial model composed of perceived intergroup threat and conspiracy beliefs mediated this relationship. These relationships held when controlling for conspiracy mentality, supporting the notion that these conspiracy beliefs were motivated at the intergroup level. In Study 2 (N = 474, pre-registered), we experimentally induced intergroup threat and exposure to conspiracy theories about immigrants. Induced threat increased conspiracy beliefs, and both increased prejudice, corroborating their causal relationship. In Study 3 (N = 350, pre-registered), we induced low personal control and made national narcissism salient to test the group-based control hypothesis. The relationship between measured (but not manipulated) national narcissism and conspiracy beliefs was more pronounced under low personal control. We discuss the role of defensive group beliefs on group-based control and prejudice against immigrants.

身份认同与偏见的联系描述了由强大的国家身份认同所持有的对移民的防御立场。最近的研究通过表明防御性民族认同（通过民族自恋来实施）而不是安全的民族认同与偏见相关联来完善这种关系。虽然之前的研究发现群体间威胁和阴谋信念可以调节认同 - 偏见的联系，但在自恋的背景下仍然需要全面和实验性地测试这些防御性群体信念的作用。识别-偏见链接。此外，遵循基于群体的控制模型，我们提出这些防御性群体信念可能在国家自恋者中更明显，以补偿低个人控制。在研究 1（N  = 1104，全国代表性样本）中，民族自恋，但不是安全的民族认同，与对移民的偏见有关，并且由感知的群体间威胁和阴谋信念组成的序列模型介导了这种关系。这些关系在控制阴谋心态时成立，支持了这些阴谋信念是在群体间水平上被激发的观点。在研究 2 ( N = 474，预先注册），我们通过实验诱导群体间威胁和暴露于有关移民的阴谋论。诱发威胁增加了阴谋信念，两者都增加了偏见，证实了他们的因果关系。在研究 3（N  = 350，预注册）中，我们诱导低个人控制并突出民族自恋以测试基于群体的控制假设。在低个人控制下，可衡量（但未受操纵）的民族自恋与阴谋信念之间的关系更为明显。我们讨论了防御性群体信仰对基于群体的控制和对移民的偏见的作用。