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A Twin and Adoption Study of Reading Achievement: Exploration of Shared-Environmental and Gene-Environment-Interaction Effects
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Kirkpatrick, Robert M.; Legrand, Lisa N.; Iacono, William G.; McGue, Matt – Learning and Individual Differences, 2011
Existing behavior-genetic research implicates substantial influence of heredity and modest influence of shared environment on reading achievement and reading disability. Applying DeFries-Fulker analysis to a combined sample of twins and adoptees (N = 4886, including 266 reading-disabled probands), the present study replicates prior findings of…
Descriptors: Reading Achievement, Reading Difficulties, Twins, Adoption
The Nature (and Nurture) of Children's Perceptions of Family Chaos
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Hanscombe, Ken B.; Haworth, Claire M. A.; Davis, Oliver S. P.; Jaffee, Sara R.; Plomin, Robert – Learning and Individual Differences, 2010
Chaos in the home is a key environment in cognitive and behavioural development. However, we show that children's experience of home chaos is partly genetically mediated. We assessed children's perceptions of household chaos at ages 9 and 12 in 2337 pairs of twins. Using child-specific reports allowed us to use structural equation modelling to…
Descriptors: Twins, Environmental Influences, Cognitive Development, Behavior Development