A Twin Study of Attachment Style in Young Adults
A Twin Study of Attachment Style in Young Adults
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DOI：
10.1111/j.1467-6494.2010.00707.x
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发表时间：
2011-10-01
影响因子：
5
通讯作者：
Stazi, Maria Antonietta
中科院分区：
文献类型：
--
作者：
Picardi, Angelo;Fagnani, Corrado;Stazi, Maria Antonietta
遗传和环境影响对依恋安全个体差异的相对贡献尚未完全了解。我们对677对年龄在23-24岁的意大利双胞胎志愿者样本（43%为男性）进行了亲密关系体验问卷调查，他们属于244对完整的双胞胎（46%为同卵双胞胎）和189对不匹配的双胞胎。利用Mx程序进行遗传结构方程建模。在依恋相关焦虑和回避的个体差异中，遗传影响分别占45%和36%。此外，焦虑和回避之间的共变主要是由于遗传因素，潜在依恋安全表型的遗传率估计为62%。未共享的环境因素解释了剩余的方差比例。尽管我们的研究结果被认为是初步的，考虑到一些研究的局限性，但它们表明，先天和后天都会影响成人依恋的个体差异。
The relative contribution of genetic and environmental influences to individual differences in attachment security is still incompletely understood. We assessed attachment style with the Experiences in Close Relationships questionnaire in a volunteer sample of 677 twins (43% male) ages 23-24 years drawn from the population-based Italian Twin Register, who belonged to 244 complete pairs (46% monozygotic) and 189 unmatched pairs. Genetic structural equation modeling was performed with the Mx program. Genetic effects accounted for 45% and 36% of individual differences in attachment-related anxiety and avoidance, respectively. Furthermore, the covariation between anxiety and avoidance was found to be mainly due to genetic factors, with heritability of the latent attachment security phenotype estimated at 62%. Unshared environmental factors explained the remaining proportion of variance. Although our findings are best regarded as preliminary given some study limitations, they suggest that both nature and nurture contribute to individual differences in adult attachment.