Genetic Influence on IQ Grows Over Life

Measured genetic contribution to variation in intelligence appears to rise from infancy (~20%) to childhood (~40%) to adulthood (~60%), plausibly because children seek and amplify environments that match their genetic propensities. This life‑course amplification matters for when and how interventions, schooling, and prediction tools should be applied. — If genetic effects strengthen with age, early interventions and the timing of educational policy matter, and claims about genetic determinism require age‑aware nuance.