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The importance of shared environment in mother-infant attachment security: A behavioral genetic study

Bokhorst, CL; Bakermans-Kranenburg, MJ; Fearon, RMP; van IJzendoorn, MH; Fonagy, P; Schuengel, C; (2003) The importance of shared environment in mother-infant attachment security: A behavioral genetic study. CHILD DEV , 74 (6) 1769 - 1782.

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Abstract

In a sample of 157 monozygotic and dizygotic twins, genetic and environmental influences on infant attachment and temperament were quantified. Only unique environmental or error components could explain the variance in disorganized versus organized attachment as assessed in the Ainsworth Strange Situation Procedure. For secure versus nonsecure attachment, 52% of the variance in attachment security was explained by shared environment, and 48% of the variance was explained by unique environmental factors and measurement error. The role of genetic factors in attachment disorganization and attachment security was negligible. Genetic factors explained 77% of the variance in temperamental reactivity, and unique environmental factors and measurement error explained 23%. Differences in temperamental reactivity were not associated with attachment concordance.

Type: Article
Title: The importance of shared environment in mother-infant attachment security: A behavioral genetic study
Keywords: RECEPTOR DRD4 GENE, EARLY ADULTHOOD, MATERNAL REPRESENTATIONS, EARLY-CHILDHOOD, TEMPERAMENT, TWIN, METAANALYSIS, SENSITIVITY, STABILITY, PARENT
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Clinical, Edu and Hlth Psychology
URI: http://discovery.ucl.ac.uk/id/eprint/167344
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