Torgersen Anne Mari, Grova Bjørg K, Sommerstad Renate
University of Oslo, Norway.
Attach Hum Dev. 2007 Jun;9(2):127-38. doi: 10.1080/14616730701349705.
The hypothesis that attachment in adults is influenced by genetic factors was investigated. The within-pair differences in attachment representation in same-sex monozygotic and dizygotic twins were compared using the Adult Attachment Interview (AAI). The results showed a clear tendency toward monozygotic twins (n = 28) being more concordant than dizygotic twins (n = 13), but the within-pair similarity was also high in both zygosity groups. The results suggest, in behavior genetic terms, that heredity and shared environment may contribute to attachment status in adulthood. This differs from studies of attachment in infancy and early childhood, which report attachment to be explained mainly by shared environment, with minimal influence from genetic factors. Furthermore, the results showed that the distribution of the attachment pattern in twins had the same percentage distribution as reported for singletons. Consequently, there was no tendency toward more insecure attachment in twins than in singletons.
研究了成人依恋受遗传因素影响这一假说。使用成人依恋访谈（AAI）比较了同性同卵双胞胎和异卵双胞胎在依恋表征上的配对差异。结果显示，同卵双胞胎（n = 28）比异卵双胞胎（n = 13）更趋于一致，但在两个合子性组中，配对相似度也都很高。从行为遗传学角度来看，结果表明遗传和共同环境可能对成年期的依恋状态有影响。这与婴儿期和幼儿期依恋的研究不同，后者报告依恋主要由共同环境解释，遗传因素影响极小。此外，结果表明双胞胎依恋模式的分布与单胎报告的百分比分布相同。因此，双胞胎中不安全依恋的倾向并不比单胎更多。
