Current large‑scale genetic studies and brain imaging produce replicable statistical links between DNA variation, brain structure, and intelligence, but concrete causal pathways (molecular processes, cell types, developmental timing) remain poorly specified. The review highlights modest effect sizes, regional brain correlates, and a lack of mechanistic models that would translate associations into interventions or robust policy guidance.
— If genetic associations outpace mechanistic understanding, policy conversations about educational use, screening, or interventions risk being driven by correlations rather than causal knowledge.
2026.04.04
63% relevant
Plomin and von Stumm emphasise that although polygenic scores predict outcomes, the causal pathways from DNA variants to brain development and cognitive processes remain unclear, directly matching the existing claim about a mechanistic gap between genetic associations and neurobiological understanding.
2021.02.02
100% relevant
Authors Ian Deary, Simon Cox, and W. David Hill summarize GWAS hits, DNA‑based heritability, brain imaging correlations, and explicitly state that 'mechanistic accounts are lacking' in linking genes to brain function and intelligence.
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