We analyzed how the effects of genetic and environmental factors on the perceptions of family interaction change from early to late adolescence. The data were collected by postal surveys on Finnish twins (N = 4808) at 12, 14 and 17 years of age and analyzed using genetic twin modeling. Additive genetic factors explained a modest share of the variation in perceived relational support (a2 = 0.30 in boys and 0.18 in girls) and relational tensions (a2 = 0.13 and 0.14, respectively) at 12 years of age, with the proportions becoming larger through 17 years of age (a2 = 0.53 in boys and 0.49 in girls for relational support; a2 = 0.35 in boys and 0.33 in girls for relational tensions). Simultaneously, the role of environment shared by co-twins decreased. These findings suggest that the associations between perceived family interaction and other factors in adulthood should be interpreted with caution, because they partly reflect genetic background, whereas in childhood, they may provide more reliable information on parental characteristics.

中文翻译：

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12至17岁的家庭互动的遗传学。

我们分析了遗传和环境因素对家庭互动感知的影响如何从青春期早期到晚期变化。这些数据是通过对12岁，14岁和17岁的芬兰双胞胎（N = 4808）进行邮政调查收集的，并使用遗传双胞胎模型进行了分析。相加的遗传因素解释了在12岁时感知的关系支持（男孩中的a2 = 0.30，女孩中的0.18）和关系紧张度（a2 = 0.13和0.14）中的适度份额的变化，该比例在17岁之前变大年龄（男孩的a2 = 0.53，女孩的关系支持为0.49；男孩的a2 = 0.35，女孩的关系紧张为0.33）。同时，双胞胎共享的环境的作用下降了。