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Sibling composition, executive function, and children's thinking about mental diversity.

Katie Kennedy1, Kristin Hansen Lagattuta1, Liat Sayfan1

  • 1Department of Psychology and Center for Mind and Brain, University of California, Davis, Davis, CA 95616, USA.

Journal of Experimental Child Psychology
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Summary
This summary is machine-generated.

Children with more older or same-sex siblings show advanced theory of mind skills. This research explores how sibling composition impacts mental state reasoning in middle childhood.

Keywords:
Birth orderExecutive functionIndividual differencesInterpretationMiddle childhoodSiblingsTheory of mind

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Area of Science:

  • Developmental Psychology
  • Cognitive Science
  • Social Neuroscience

Background:

  • Previous studies on sibling composition and theory of mind (ToM) primarily focused on younger children's false belief understanding.
  • Research has not extensively explored the link between sibling composition and more advanced ToM abilities in middle childhood.

Purpose of the Study:

  • To investigate if sibling composition predicts advanced mental state reasoning in children aged 4 to 11 years.
  • To expand the understanding of how sibling constellations influence theory of mind development beyond early childhood.

Main Methods:

  • A study involving 192 children aged 4 to 11 years.
  • Utilized interpretive theory of mind tasks to assess advanced mental state reasoning.
  • Controlled for age and executive function as potential confounding variables.

Main Results:

  • Sibling composition significantly predicted theory of mind abilities in middle childhood.
  • A greater number of older siblings was associated with stronger mental state reasoning.
  • Having more same-sex siblings also correlated with enhanced theory of mind skills.
  • These effects were observed even after controlling for age and executive function.

Conclusions:

  • Sibling composition, specifically the number of older and same-sex siblings, is a significant predictor of theory of mind development during middle childhood.
  • These findings highlight the nuanced role of family structure in shaping advanced cognitive abilities.
  • The study provides novel insights into the factors influencing individual differences in theory of mind beyond early childhood.