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Related Experiment Video

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Use of a Video Scoring Anchor for Rapid Serial Assessment of Social Communication in Toddlers
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Twin and sibling attachment in a nationally representative sample.

R Chris Fraley1, Caroline M Tancredy

  • 1University of Illinois at Urbana-Champaign, Champaign, IL 61820, USA. rcfraley@uiuc.edu

Personality & Social Psychology Bulletin
|February 24, 2012
PubMed
Summary
This summary is machine-generated.

Twin siblings show stronger attachment than nontwin siblings, supporting attachment theory. Identical twins exhibit higher attachment, aligning with inclusive fitness, suggesting both theories explain sibling bonds.

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Area of Science:

  • Psychology
  • Sociology
  • Behavioral Science

Background:

  • Sibling relationships are crucial throughout the lifespan.
  • Attachment theory explains deep emotional bonds.
  • Inclusive fitness theory explains altruistic behaviors between relatives.

Purpose of the Study:

  • To investigate if twin relationships represent a form of attachment.
  • To explore the underlying theoretical frameworks explaining sibling attachment.

Main Methods:

  • Utilized data from a nationally representative sample.
  • Employed cross-sectional analyses to examine sibling attachment.
  • Compared attachment levels between twin and nontwin siblings.

Main Results:

  • Twin siblings demonstrated significantly higher attachment than nontwin siblings.
  • Identical twins showed greater mutual attachment than fraternal twins.
  • Attachment to siblings decreased with age and marriage.

Conclusions:

  • Sibling bonds, particularly in twins, are rooted in attachment.
  • Both attachment theory and inclusive fitness perspectives are essential for understanding sibling relationships.
  • The role of siblings as attachment figures evolves across the adult lifespan.