Genetic and environmental transactions underlying educational attainment |
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| Authors: | Wendy Johnson Ian J Deary William G Iacono |
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| Institution: | aCentre for Cognitive Ageing and Cognitive Epidemiology and Department of Psychology, University of Edinburgh, UK;bDepartment of Psychology, University of Minnesota — Twin Cities, United States |
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| Abstract: | This report used a population-representative longitudinal twin study with two birth cohorts to explore the association between intelligence and education by understanding how genetic and environmental influences on intelligence moderate genetic and environmental influences on school grades and educational attainment. Nonshared environmental influences on grades were strong when IQ was low, but decreased across the range of IQ. Shared environmental influences common to age 24 educational attainment and age 17 IQ were strong when IQ was low, but genetic influences common to IQ and education were strong when IQ was high. These results suggest that the causal mechanisms linking educational variables with intelligence differ for people with different levels of intelligence. |
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| Keywords: | Grade point average Gene– environment correlation and interaction Educational attainment IQ Genetic and environmental influences |
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