University of Illinois at Urbana-Champaign, Champaign, IL 61820, USA.
Pers Soc Psychol Bull. 2012 Mar;38(3):308-16. doi: 10.1177/0146167211432936.
The objective of this research was to evaluate the hypothesis that twin relationships are attachments, using data from a nationally representative sample. The results indicated that twin siblings were more likely than nontwin siblings to be attached to their siblings. Moreover, analyses indicated that both attachment theoretical and inclusive fitness perspectives are necessary for explaining these findings. Namely, twins were more likely to be attached than nontwin siblings, as expected from an attachment perspective. But identical twins were more likely than fraternal twins to be attached to one another, as might be expected from an inclusive fitness perspective. Cross-sectional analyses indicated that older people are less likely than younger people to use their sibling as an attachment figure compared to younger people and that married adults are less likely to use their sibling as an attachment figure than nonmarried people.
本研究旨在通过全国代表性样本评估双胞胎关系是依恋关系的假设。研究结果表明，与非双胞胎兄弟姐妹相比，双胞胎兄弟姐妹更有可能相互依恋。此外，分析表明，解释这些发现既需要依恋理论，也需要适合度理论。具体来说，正如依恋理论所预期的那样，双胞胎比非双胞胎兄弟姐妹更有可能相互依恋。但同卵双胞胎比异卵双胞胎更有可能相互依恋，这可能是适合度理论所预期的。横断面分析表明，与年轻人相比，老年人不太可能将兄弟姐妹作为依恋对象，而年轻人更有可能将兄弟姐妹作为依恋对象，已婚成年人不太可能将兄弟姐妹作为依恋对象，而非已婚成年人。
