ObjectiveMaladaptive personality traits have been implicated in romantic relationship dissatisfaction, but the etiology of those links and the degree to which they extend to other types of relationships are unclear. The purpose of this study was to examine associations between maladaptive personality traits and satisfaction in various relationships using a co‐twin control design to identify potential environmental contributions.MethodThe sample consisted of 1340 older adult twin participants from the Minnesota Twin Registry (Mage = 70.3) that completed the Personality Inventory for DSM‐5 Faceted Brief Form and Network of Relationships Inventory (Revised for Older Adults).ResultsSeveral maladaptive personality traits were phenotypically associated with relationship dissatisfaction, with detachment and negative affect having the largest effects. Further, within twin pair differences in detachment and negative affect were associated with greater relationship dissatisfaction, suggesting that observed associations were mediated partly by the unique environment, not solely the result of genetic and familial confounding. Both phenotypic and co‐twin associations were strongest overall in the romantic partner relationship.ConclusionThese findings support the notion that maladaptive personality traits are implicated in interpersonal dysfunction across multiple domains.

中文翻译：

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适应不良的人格特质和老年人关系满意度：理解关联的双生控制方法


目的适应不良的人格特质与恋爱关系的不满有关，但这些联系的病因以及它们延伸到其他类型关系的程度尚不清楚。本研究的目的是使用双胞胎控制设计来检查适应不良的人格特征与各种关系中的满意度之间的关联，以确定潜在的环境贡献。方法样本由来自明尼苏达双胞胎登记处的 1340 名老年双胞胎参与者组成（中号年龄= 70.3），完成了 DSM-5 多面简表人格量表和关系网络量表（针对老年人修订）。结果 几种适应不良的人格特征在表型上与关系不满意相关，其中疏离和负面情绪的影响最大。此外，在双胞胎中，疏离和负面情绪的差异与更大的关系满意度相关，这表明观察到的关联部分是由独特的环境介导的，而不仅仅是遗传和家族混杂的结果。在浪漫伴侣关系中，表型和双胞胎关联总体上最强。结论这些发现支持这样的观点，即适应不良的人格特质与多个领域的人际功能障碍有关。