ABSTRACT Using a twin study design, we explored the extent to which affectionate communication is a heritable behavioral trait. Participants (N = 928) were 464 adult twin pairs (229 monozygotic, 235 dizygotic) who provided data on their affectionate communication behaviors. Through ACE modeling, we determined that approximately 45% of the variance in trait expressed affectionate communication is heritable, whereas 21% of the variance in trait received affection was heritable. A bivariate Cholesky decomposition model also revealed that almost 26% of the covariation in expressed and received affection is attributable to additive genetic factors. These estimates were driven primarily by females and those 50 years of age and older. The results suggest the utility of giving greater attention to genetic and biological influences on communicative behaviors by expanding the scope of communication theory beyond consideration of only environmental influences.

中文翻译：

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深情交流的遗传性：双胞胎研究

摘要使用双胞胎研究设计，我们探讨了深情交流在多大程度上是一种可遗传的行为特征。参与者 (N = 928) 是 464 对成年双胞胎（229 对同卵，235 对双卵），他们提供了有关他们深情交流行为的数据。通过 ACE 建模，我们确定表达深情交流的特征中大约 45% 的方差是可遗传的，而接受情感的特征中 21% 的方差是可遗传的。双变量 Cholesky 分解模型还显示，表达和接受的情感中近 26% 的协变可归因于加性遗传因素。这些估计主要由女性和 50 岁及以上的人推动。