Genetic factors account for a substantial share of variation in educational outcomes and related behavioral traits¶

Claim · All claims
Evidence · 1 study (2 entries) · review r2–r3 · q2
Currency · newest study 2017 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Twin and adoption studies consistently find genetic factors account for up to 40% of differences in educational outcomes in developed Western countries. → David Cesarini and Peter M. Visscher 2017 q2 i? Holding genetic relatedness constant, siblings reared in the same household are usually more similar than siblings reared in separate households. → David Cesarini and Peter M. Visscher 2017 (2)

Evidence¶

David Cesarini and Peter M. Visscher 2017¶

David Cesarini and Peter M. Visscher. (2017). Genetics and educational attainment. npj Science of Learning 2:4. https://doi.org/10.1038/s41539-017-0005-6

q2 · i? · review · r3

Narrative review synthesis of twin and adoption research: the review reports genetic factors account for "a modest share (up to 40%)" of differences in educational outcomes across individuals in developed, Western countries.

"Behavior–genetic studies of twins and adoptees consistently find genetic factors accounting for at least a modest share (up to 40%) of differences in educational outcomes across individuals in developed, Western countries"

David Cesarini and Peter M. Visscher 2017 (2)¶

David Cesarini and Peter M. Visscher. (2017). Genetics and educational attainment. npj Science of Learning 2:4. https://doi.org/10.1038/s41539-017-0005-6

q2 · i? · review · r2

Same Swedish sibling-correlation analyses: "holding constant genetic relatedness, siblings reared in the same household are usually more similar than siblings reared in separate households."

"Second, holding constant genetic relatedness, siblings reared in the same household are usually more similar than siblings reared in separate households."

Discussion¶

Related Claims¶

• 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
• A Classical Twin Design model of educational attainment in the TwinLife sample estimates shared environmental influence at 43% and additive genetic influence at 34% — possibly the same claim (merge candidate)
• 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
• Educational achievement is highly heritable, and the common environmental variance is attributable to SES effects — related
• GPAΔ is strikingly highly heritable (85%), exceeding the heritability of achievement itself (67%) — related
• Twin and adoption studies suggest that 50–80% of IQ variation is due to genetic differences, with the range reflecting population heritability — a broader claim this one bears on
• Dizygotic twin correlations for educational attainment are consistently higher than non-twin sibling correlations across countries, suggesting twin-specific shared environments are a general phenomenon — related
• Within twin pairs, education–methylation associations persist but are attenuated, implicating shared environmental or genetic factors — related