Heritability and the equal environments assumption: Evidence from multiple samples of misclassified twins

Dalton Conley, Emily Rauscher, Christopher Dawes, Patrik K.E. Magnusson, Mark L. Siegal

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

Classically derived estimates of heritability from twin models have been plagued by the possibility of genetic-environmental covariance. Survey questions that attempt to measure directly the extent to which more genetically similar kin (such as monozygotic twins) also share more similar environmental conditions represent poor attempts to gauge a complex underlying phenomenon of GE-covariance. The present study exploits a natural experiment to address this issue: Self-misperception of twin zygosity in the National Longitudinal Survey of Adolescent Health (Add Health). Such twins were reared under one "environmental regime of similarity" while genetically belonging to another group, reversing the typical GE-covariance and allowing bounded estimates of heritability for a range of outcomes. In addition, we examine twins who were initially misclassified by survey assignment - a stricter standard - in three datasets: Add Health, the Minnesota Twin Family Study and the Child and Adolescent Twin Study in Sweden. Results are similar across approaches and datasets and largely support the validity of the equal environments assumption.

Original languageEnglish (US)
Pages (from-to)415-426
Number of pages12
JournalBehavior Genetics
Volume43
Issue number5
DOIs
StatePublished - Aug 1 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Genetics(clinical)

Keywords

  • ACE model
  • Equal environments
  • Heritability
  • Twin misclassification

Fingerprint Dive into the research topics of 'Heritability and the equal environments assumption: Evidence from multiple samples of misclassified twins'. Together they form a unique fingerprint.

Cite this