Certain disapproving friends and family may interfere in others’ romantic relationships by undermining commitment processes. In the current study, we assessed whether friends and family members’ scores on the Dark Tetrad, a constellation of socially aversive personality traits including narcissism, Machiavellianism, psychopathy, and sadism, predict relationship interference. In Study 1, 206 people selected a friend who was currently in a romantic relationship they disliked or disapproved of. They then indicated how often they interfered in the disliked couple’s relationship, completed measures of the Dark Tetrad, and additional measures of interest (e.g., gender, closeness to the target of interference). In Study 2, 180 people selected a family member who was currently or formerly in a disliked relationship, before completing the same measures. In both studies, overall dark personality and closeness to the friend or family member positively correlated with relationship interference. Additionally, when controlling for overall dark personality and the other Dark Tetrad traits, sadism specifically predicted interference with friends’ relationships; high narcissism and, surprisingly, low Machiavellianism predicted interference with family members’ relationships. Implications for dark personality traits and relationships are discussed.

某些不赞成的朋友和家人可能会破坏承诺过程，从而干扰他人的恋爱关系。在当前的研究中，我们评估了朋友和家人在“黑暗四合会”上的得分是否能预测关系干扰。在研究1中，有206人选择了一个目前不喜欢或不喜欢的恋爱关系中的朋友。然后，他们指出了他们多久干预一次不喜欢的夫妻的关系，完成《暗黑血统》的措施以及其他感兴趣的措施（例如，性别，与被干扰者的亲近度）。在研究2中，有180人选择了目前或以前不喜欢的家庭成员，然后再执行相同的措施。在两项研究中，总体上黑暗的人格和与朋友或家人的亲密关系与关系干扰呈正相关。此外，在控制整体黑暗人格和其他黑暗四面体特征时，虐待狂特别预言了对朋友关系的干扰。高自恋和令人惊讶的低马基雅维利主义预示着对家庭成员关系的干扰。讨论了对黑暗人格特质和人际关系的暗示。低的马基雅维利主义（Machiavellianism）预言会干扰家庭成员的关系。讨论了对黑暗人格特质和人际关系的暗示。低的马基雅维利主义（Machiavellianism）预言会干扰家庭成员的关系。讨论了对黑暗人格特质和人际关系的暗示。