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Using Cholesky Decomposition to Explore Individual Differences in Longitudinal Relations between Reading Skills
Published on: September 17, 2019
Parental education moderates genetic influences on reading disability
Angela Friend1, John C DeFries, Richard K Olson
1Department of Psychology, University of Colorado at Boulder, Boulder, CO 80309, USA. angela.friend@colorado.edu
Psychological Science
|December 17, 2008
Summary
Parental education level impacts genetic and environmental influences on children's reading disabilities. Higher parental education correlated with stronger genetic influence and weaker environmental influence on reading skills.
Area of Science:
- Behavioral Genetics
- Developmental Psychology
- Educational Psychology
Background:
- Reading disabilities are complex, influenced by both genetic and environmental factors.
- Understanding the interplay between genes and environment is crucial for effective interventions.
- Previous research suggests environmental factors can moderate genetic predispositions.
Purpose of the Study:
- To investigate how parental education, as a proxy for environmental factors, moderates the genetic and environmental influences on reading disabilities in twins.
- To explore the implications for understanding the etiology of reading disabilities and informing educational policies.
Main Methods:
- Utilized a sample of 545 pairs of identical and fraternal twins (mean age 11.5 years).
- Assessed reading disabilities and collected data on parents' years of education.
- Employed quantitative genetic modeling to estimate the heritability and shared/non-shared environmental influences on reading disabilities, conditional on parental education.
Main Results:
- Parental education level was significantly associated with the magnitude of genetic influence on reading disabilities.
- Children of parents with higher education exhibited greater genetic influence and lower environmental influence on reading disabilities.
- Conversely, children of parents with lower education showed less genetic influence and greater environmental influence.
Conclusions:
- Parental education acts as a significant environmental moderator, altering the expression of genetic predispositions for reading disabilities.
- These findings have implications for behavior genetic and molecular genetic research, refining diagnostic and remediation strategies for reading disabilities.
- The results underscore the importance of considering socioeconomic and environmental contexts in public education policy and intervention design.
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