Intelligence is genetically inherited rather than being an acquired trait
the verdict
SUPPORTED
the evidence backs this
confidence 75/100
Contemporary twin and genetic studies consistently demonstrate that intelligence is substantially heritable, with heritability estimates ranging from 75% to 85% by adolescence and early adulthood.
Evidence for · 2
Longitudinal Study of Language of Twins at Ages 9 and 14 Years: Twinning, Zygosity, and Heritability.
2026 · cited by 0
This longitudinal twin study reports that heritability estimates for nonverbal intelligence reach up to 85% by adolescence.
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More for · 1
Longitudinal associations between cognitive ability and socioeconomic status are partially genetic in nature.
2026 · cited by 0
Using twin data, this study estimates the heritability of IQ at approximately 75%, highlighting a strong genetic foundation for cognitive ability.