The intelligence of heritability.
Интеллект наследуемости
1994-07-01
SCID: 54.1/7ftfc576
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gene–environment interactiongenotype variationheritability ratioindividual differences in behaviorvariance partitioning
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Abstract (AI)
The influences of heredity and environment on behaviour are sometimes quantified as a heritability ratio, which assigns a percentage of variation in test scores to variation in the genotypes of individuals. There are compelling reasons, both biological and statistical, to doubt the validity of the common practice of partitioning variance in this manner. This paper outlines the conceptual foundations and explains the weaknesses of heritability analysis, reviews evidence of heredity-environment interaction during development, and argues for an alternative research strategy to detect and understand the functions of specific genes relevant for individual differences in behaviour.
Key Findings
1
Evidence indicates that heredity and environment interact during development, challenging simple independent contributions to behavioral variation.
2
Heritability ratios commonly used to assign behavioral test-score variation to genotypic variation have important biological and statistical validity problems.
3
The paper advocates replacing conventional heritability analysis with research targeting the specific genes and functions underlying individual behavioral differences.
4
Variance partitioning through heritability analysis is conceptually limited for explaining how heredity and environment influence behavior.
Research Object
heritability analysis of individual differences in behaviour
Research Subject
the validity, conceptual weaknesses, and limitations of partitioning behavioural variation into genetic and environmental components, including heredity–environment interaction
Publication Details
Publication Date
1994-07-01
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