When does socioeconomic status (SES) moderate the heritability of IQ? No evidence for g x SES interaction for IQ in a representative sample of 1,176 Australian adolescent twin pairs

Timothy Bates, Narelle K. Hansell, Nicholas G Martin, Margaret. J. Wright

Research output: Contribution to journalArticlepeer-review

Abstract

Bioecological theory predicts that cognitive ability is more heritable among those raised in higher socioeconomic status (SES) families. However, the mechanism of this effect is unclear, and the effect may not be universal. We tested for gene × SES interaction effects on Full-scale IQ in 2,307 adolescent Australian twins (mean age 16.2 years). Mean IQ scores were modestly higher among those from higher SES backgrounds, but the magnitude of genetic influences on IQ was uniformly high across the range of SES. Research identifying the conditions under which expressed genetic potential can become decoupled from parental SES, as seen here, is needed. We speculate that school provision may be key.
Original languageEnglish
Pages (from-to)10-15
Number of pages6
JournalIntelligence
Volume56
Early online date21 Feb 2016
DOIs
Publication statusPublished - 20 May 2016

Keywords

  • IQ
  • gene–environment interaction
  • G × SES
  • cognitive development
  • child development

Fingerprint Dive into the research topics of 'When does socioeconomic status (SES) moderate the heritability of IQ? No evidence for g x SES interaction for IQ in a representative sample of 1,176 Australian adolescent twin pairs'. Together they form a unique fingerprint.

Cite this