Genetic and environmental variance components of educational achievement decrease with increasing parental SES¶

Claim · All claims
Evidence · 1 study · associational r3 · q2
Currency · newest study 2019 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? In classical twin modeling, both genetic and environmental variance components of EA were smaller in higher SES groups. → Eveline L. de Zeeuw 2019

Evidence¶

Eveline L. de Zeeuw 2019¶

Eveline L. de Zeeuw, Kees-Jan Kan, Catharina E. M. van Beijsterveldt, Hamdi Mbarek, Jouke-Jan Hottenga, Gareth E. Davies, Michael C. Neale, Conor V. Dolan and Dorret I. Boomsma. (2019). The moderating role of SES on genetic differences in educational achievement in the Netherlands. npj Science of Learning 4:13. https://doi.org/10.1038/s41539-019-0052-2

q2 · i? · associational · r3

Genetic covariance structure modeling in a classical twin design (2479 MZ and 4450 DZ pairs), with means and variance components estimated per SES group and corrected for censoring; variance components decreased with increasing SES (Δ−2LL = 89.7, p < 0.001; Table 1).

"Noticeably, genetic and environmental variance differed across the groups and depended on SES ( Δ−2LL = 89.7, Δdf = 9, p < 0.001). Speci fi-cally, the genetic and environmental variance components decreased with increasing SES."

Discussion¶

Related Claims¶

• Average educational achievement at age 12 increases with parental SES in the Netherlands — related
• Educational achievement is highly heritable, and the common environmental variance is attributable to SES effects — related
• A Classical Twin Design model of educational attainment in the TwinLife sample estimates shared environmental influence at 43% and additive genetic influence at 34% — related
• Twin-specific shared environments account for a substantial portion of CTD shared-environment estimates for educational attainment and cannot be interpreted as between-family environmental differences — related
• Under phenotypic assortment NTFD models, parental education shows no environmental effect on offspring educational attainment once genetic influences are accounted for — related
• The best-fitting NTFD model estimates heritability of educational attainment at 51% and total shared environmental influence at 26%, disaggregated into twin-specific (16%) and sibling-shared (10%) components — related
• Adjusting published twin-study ACE estimates for assortative mating raises mean heritability by about 17 points and lowers shared environmental estimates by about 16 points — related
• SES does not moderate genetic, shared, or nonshared environmental variance in four-year-olds' learning motivation — related