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On the big list of causes
1University of Virginia, Charlottesville, VA, USA ent3c@virginia.edu; https://uva.theopenscholar.com/eric-turkheimer.
The Behavioral and Brain Sciences
|September 11, 2023
Summary
Genome-wide association studies (GWASs) have reduced estimates of genetic influence on behavior compared to twin studies. While genetic causation is not zero, specific genetic links to behavior remain largely unknown.
Area of Science:
- Behavioral genetics
- Quantitative genetics
- Human genomics
Background:
- Twin studies historically estimated high heritability for behavioral differences.
- Genome-wide association studies (GWASs) represent a methodological shift in genetic research.
Purpose of the Study:
- To evaluate the impact of the methodological shift from twin studies to GWASs on heritability estimates.
- To discuss the current understanding of genetic causation in behavioral differences.
Main Methods:
- Comparison of heritability estimates derived from twin studies versus GWASs.
- Literature review and critical analysis of existing research on genetic causation of behavior.
Main Results:
- The shift to GWASs has led to diminished estimates of genetic causation for behavioral traits.
- Despite reduced estimates, the overall genetic influence on behavior is acknowledged to be non-zero.
Conclusions:
- Current GWAS methodologies may underestimate the true genetic contribution to behavioral variation.
- Further research is needed to identify specific genetic variants underlying behavioral differences.
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