General intelligence factor scores are influenced by a combination of genetic and environmental factors
the verdict
SUPPORTED
the evidence backs this
confidence 89/100
Extensive twin and behavioral genetic research consistently supports the conclusion that general intelligence is shaped by a complex interplay of both genetic and environmental factors.
Evidence for · 4
Explaining the Increasing Heritability of Cognitive Ability Across Development
2013 · cited by 152
Paper 2 demonstrates through a meta-analysis of longitudinal behavioral genetic studies that genetic influences account for increasing proportions of variation in cognitive ability across development.
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More for · 3
Mechanisms of developmental change in genetic and environmental influences on intelligence
2024 · cited by 2
Paper 5 confirms that general intelligence shows substantial heritability that increases from childhood to adolescence alongside environmental influences.
Cognitive reserve in non-affective first-episode psychosis: contributions of polygenic scores, early clinical features, and environment.
2026 · cited by 0
Paper 8 shows that cognitive reserve and intelligence-related constructs are significantly shaped by a combination of genetic polygenic scores and environmental factors.
Genetic contribution to intrinsic functional connectivity underlying general intelligence: evidence from adult twin study.
2025 · cited by 0
Paper 9 utilizes twin study methodologies to show that functional connectivity patterns linked to general intelligence display significant genetic underpinnings.