Previous research found that political polarization goes hand in hand with being strongly identified with a political ingroup. In this research, we assumed this should be the case only among those who identify with their political ingroup in a narcissistic way (stemming from frustrated needs and predicting outgroup hostility). This hypothesis was tested in one experimental (Study 4, n = 525) and three cross‐sectional (Study 1, n = 320; Study 2, n = 316; Study 3, n = 500) studies conducted among American and Polish participants. In all studies, we found a consistent positive link between political narcissism, but not political identification, and the blatant dehumanization of political outgroups. This relationship held over and above metadehumanization, measured in Studies 2 and 3. In Studies 3 and 4, we additionally found that political narcissism may also predict aggressive inclinations towards political outgroups, measured with the voodoo doll task. These findings suggest that differentiation between political narcissism and political identification may help to better understand the psychological underpinnings of political polarization.

中文翻译：

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如此不同却又如此相似？政治集体自恋预示着保守派和自由派之间的政治外群体公然非人化


先前的研究发现，政治两极分化与对政治内群体的强烈认同是密切相关的。在这项研究中，我们假设这种情况只适用于那些以自恋方式认同其政治内群体的人（源于受挫的需求和预测外群体的敌意）。这一假设在美国和波兰参与者中进行的一项实验（研究 4，n = 525）和三项横断面研究（研究 1，n = 320；研究 2，n = 316；研究 3，n = 500）中得到了检验。在所有研究中，我们发现政治自恋（而非政治认同）与政治外群体公然非人化之间存在一致的积极联系。这种关系超越了研究 2 和 3 中衡量的元非人化。在研究 3 和 4 中，我们还发现政治自恋也可能预示着对政治外群体的攻击倾向，这是通过巫毒娃娃任务来衡量的。这些发现表明，区分政治自恋和政治认同可能有助于更好地理解政治两极分化的心理基础。