Intelligence quotient is a heritable trait
Extensive twin and genetic studies consistently demonstrate that intelligence quotient (IQ) is a moderately to highly heritable trait, with genetic factors accounting for a substantial portion of the variance in cognitive test scores.
The provided literature consistently reports moderate to high heritability estimates for intelligence quotient (IQ) and related cognitive phenotypes across various age groups and methodologies. The papers supporting the claim (such as [0], [2], [7], [8], [9], [10]) explicitly provide quantitative genetic models showing significant heritability. There are no papers in the retrieved list refuting the heritability of IQ as a general concept.
David C Rowe, Kristen C Jacobson, Edwin J C G Van den Oord. Genetic and Environmental Influences on Vocabulary IQ: Parental Education Level as Moderator. 1999. https://doi.org/10.1111/1467-8624.00084
The study estimates heritability of vocabulary IQ to be significant, though moderated by parental education.
See more details
Samantha M. Freis, C. Morrison, J. Lessem, J. Hewitt, N. Friedman. Genetic and environmental influences on executive functions and intelligence in middle childhood.. 2020. https://doi.org/10.31234/osf.io/xpba4
Twin analyses indicate that IQ displays moderate to high heritability estimates in childhood.
Yu Chen, Caiqi Chen, Tingting Wu, Boyu Qiu, Wei Zhang, Jin Fan. Accessing the development and heritability of the capacity of cognitive control.. 2020. https://doi.org/10.1016/j.neuropsychologia.2020.107361
Results demonstrate that cognitive control capacity and associated IQ are highly heritable.
Karin Modig, Karri Silventoinen, Per Tynelius, Jaakko Kaprio, Finn Rasmussen. Genetics of the association between intelligence and nicotine dependence: a study of male Swedish twins.. 2011. https://doi.org/10.1111/j.1360-0443.2011.03384.x
Findings show that IQ exhibits moderate heritability in young adult twin cohorts.
Ximena Goldberg, Silvia Alemany, Araceli Rosa, Marco Picchioni, Igor Nenadic, Sheena F Owens, Fruhling Rijsdijk, Irene Rebollo, Heinrich Sauer, Robin M Murray, Lourdes Fañanás, Timothea Toulopoulou. Substantial genetic link between IQ and working memory: implications for molecular genetic studies on schizophrenia. the European twin study of schizophrenia (EUTwinsS).. 2013. https://doi.org/10.1002/ajmg.b.32158
Bivariate analyses indicate that phenotypic correlations between IQ and working memory are largely driven by shared genetic variance.
Mabel L Rice, Stephen R Zubrick, Kathleen Kelsey Earnest, Lesa Hoffman. 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
Longitudinal data report substantial heritability estimates for nonverbal intelligence quotient at age 14.
The paper trail · every fact has a biography
Challenge the receipt
Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.
Terms · Privacy · How verdicts work · Dispute this receipt