Intelligence is genetically inherited rather than being an acquired trait

the verdict

SUPPORTED

the evidence backs this

Recorded sources

2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

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.

The analysis

The retrieved papers provide strong, quantitative evidence from twin studies showing high heritability for intelligence (IQ) ranging from 75% to 85% in older children and adults. There are no papers in the provided set refuting the genetic contribution to intelligence. Therefore, the claim is supported.

Evidence for · 2

Longitudinal Study of Language of Twins at Ages 9 and 14 Years: Twinning, Zygosity, and Heritability.

Recorded source metadata

Rice ML, Zubrick SR, Earnest KK, Hoffman L. Longitudinal Study of Language of Twins at Ages 9 and 14 Years: Twinning, Zygosity, and Heritability.. 2026. https://doi.org/10.1044/2026_jslhr-25-00673

This longitudinal twin study reports that heritability estimates for nonverbal intelligence reach up to 85% by adolescence.

Source citation format

See more details

More for · 1

Longitudinal associations between cognitive ability and socioeconomic status are partially genetic in nature.

Recorded source metadata

Kajonius PJ. Longitudinal associations between cognitive ability and socioeconomic status are partially genetic in nature.. 2026. https://doi.org/10.1038/s41598-026-37786-3

Using twin data, this study estimates the heritability of IQ at approximately 75%, highlighting a strong genetic foundation for cognitive ability.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 7501 Aug 2026

More receipts

Is it true that Phonological evolution involves regular processes of phoneme elision, vowel nasalization, and tonogenesis?Is it true that Hemangiomas are treatable with medication?Is it true that Research identifies forms of intelligence that diverge from standard IQ measures?

Random receipt →The Trust Wiki →

Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.

Check your own claim

Challenge the receipt

I have a source that contradicts this verdict I have a source that supports it No source: request a receipt review Requests are recorded for review. This does not start an automatic check or guarantee a response time.

trust me, bro: win the argument, pass the class, survive peer review.

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work · Dispute this receipt