Previous research suggested that narcissism is associated with infidelity and reduced commitment in relationships. However, the majority of studies supporting this association were conducted among individuals and did not examine dyadic paths and also conceptualized and measured narcissism as a global variable, lacking a nuance perspective of the two traits of narcissism (i.e., grandiose and vulnerable). The present study sought to examine attitudes toward infidelity from a dyadic perspective, using narcissism personality traits (grandiose and vulnerable) as predictors. The effect of narcissism personality traits on attitudes toward infidelity was investigated among 135 couples (N = 270) in enduring relationships. To assess whether attitudes toward infidelity were explained by grandiose narcissism and vulnerable narcissism, we used multivariate multilevel statistical model for matched pairs to evaluate the effect of each partner's characteristics on their own (actor effect) and their partner's (partner effect) attitudes. The results indicate that females' attitudes toward infidelity were positively associated with their own grandiose narcissism and vulnerable narcissism and negatively associated with their partner's grandiose narcissism. Males' attitudes toward infidelity were positively associated with both their own and their partner's vulnerable narcissism but not with their or their partner's grandiose narcissism. The results highlighted the importance of studying different aspects of narcissism in relation to dyadic processes within intimate relationships in general and regarding infidelity in particular. Our findings suggest that more or less favorable attitudes toward infidelity depend not only on the individual's narcissistic traits but on his/her partner's grandiosity and vulnerability as well. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

中文翻译：

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自恋特征与不忠态度之间的关系：二元分析。

先前的研究表明，自恋与不忠和减少人际关系承诺有关。然而，大多数支持这种关联的研究都是在个体中进行的，没有考察二元路径，也没有将自恋概念化和测量为一个全局变量，缺乏对自恋的两种特征（即浮夸和脆弱）的细微差别的视角。本研究试图从二元的角度审视人们对不忠的态度，并使用自恋人格特征（浮夸和脆弱）作为预测因素。研究人员在 135 对处于持久关系中的夫妇（N = 270）中调查了自恋人格特质对不忠态度的影响。为了评估对不忠的态度是否可以用夸大自恋和脆弱自恋来解释，我们使用配对的多元多水平统计模型来评估每个伴侣的特征对其自身（演员效应）和伴侣（伴侣效应）态度的影响。结果表明，女性对不忠的态度与自身的浮夸自恋和脆弱自恋呈正相关，与伴侣的浮夸自恋呈负相关。男性对不忠的态度与他们自己和伴侣的脆弱自恋呈正相关，但与他们或伴侣的浮夸自恋无关。研究结果强调了研究自恋的不同方面与亲密关系中的二元过程相关的重要性，特别是不忠的重要性。我们的研究结果表明，对不忠的态度或多或少有利不仅取决于个人的自恋特征，还取决于他/她的伴侣的浮夸和脆弱。（PsycInfo 数据库记录 (c) 2023 APA，保留所有权利）。