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[–]WickedWitchOfTheWest 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

Genetic and environmental contributions to IQ in adoptive and biological families with 30-year-old offspring

Highlights

  • Genetic and environmental sources of variance in IQ were estimated from 486 adoptive and biological families

  • Families include 419 mothers, 201 fathers, 415 adopted and 347 biological fully-adult offspring (M age = 31.8 years; SD = 2.7)

  • Proportion of variance in IQ attributable to environmentally mediated effects of parental IQs was estimated at .01 [95% CI 0.00, 0.02]

  • Heritability was estimated to be 0.42 [95% CI 0.21, 0.64]

  • Parent-offspring correlations for educational attainment polygenic scores show no evidence of adoption placement effect

Environmentalists BTFO.