Twin and sibling attachment in a nationally representative sample

Personality & Social Psychology Bulletin
R Chris Fraley, Caroline M Tancredy

Abstract

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.

References

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Feb 2, 2006·Journal of Personality and Social Psychology·Caroline M Tancredy, R Chris Fraley
Aug 19, 2009·Journal of Family Psychology : JFP : Journal of the Division of Family Psychology of the American Psychological Association (Division 43)·Lawrence A Kurdek
Dec 19, 2009·Personality & Social Psychology Bulletin·Shinobu Kitayama

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Citations

Nov 20, 2012·Clinical Psychology Review·Kirsten L BuistPeter Prinzie
Nov 1, 2016·Behavior Genetics·Katharine M MarkBonamy R Oliver
Mar 1, 2017·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Katharine M MarkBonamy R Oliver
Nov 11, 2017·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Pascal HuguetDorret I Boomsma
Jun 20, 2018·Journal of Research on Adolescence : the Official Journal of the Society for Research on Adolescence·Kayla N AndersonAscan F Koerner
Jun 4, 2019·Frontiers in Psychology·Lucia L CarliAngela Tagini

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