IQ Heritability Debate

Cluster focuses on debates about the genetic heritability of IQ, its correlations with parental income, wealth, success, and educational outcomes, often citing twin/adoption studies and Wikipedia.

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Keywords

duke.edu SES jstor.org phys.org classsizematters.org SAT wordpress.com nlm.nih dukespace.lib marginalrevolution.com iq intelligence studies iq tests parents correlated twin parental children genetic

Sample Comments

rvern Jul 30, 2017 View on HN

Yes, it can be inferred: https://en.wikipedia.org/wiki/Heritability_of_IQ.

de_Selby Nov 17, 2019 View on HN

It's just genetics, parent income is correlated with intelligence.

bayesian_horse Jul 28, 2019 View on HN

You don't seem to understand that part of the article.There are no discrete models for inheriting intelligence and wealth, and making such sweeping claims about this issue is just not warranted.It has been shown that wealth improves children's intelligence and "success". It has also been shown that intelligence is one factor in success, but not the only one. Even academic success is "only" about 70% dependent on IQ.Another problem is the difference in backg

username90 May 19, 2021 View on HN

No, intelligence is mostly inherited. If your biological parents were smart then you will almost surely be smart and vice versa. And smart people end to earn more money, so intelligence is indirectly correlated with parental wealth. But when you put kids from poor parents into rich households they will continue to do poorly. They do a bit better, but their biological parents still matters more.If it was easy to produce smart kids then we would already do it, since smart people are so much mor

lutorm Sep 28, 2010 View on HN

As people here are fond of pointing out: correlation does not imply causation. One can easily make a plausible case that the reason people from wealthy backgrounds score higher on measures of intelligence is because, to the extent intelligence really is inherited, attempts to quantify it are still sensitive to things like quality of education and intellectual stimulation throughout life, both of which strongly correlate with wealth.

throwaway33432 May 27, 2021 View on HN

intelligence has a hereditary component; social status and wealth correlate with intelligence.

jlawson Aug 5, 2022 View on HN

No, this issue of test practice being a confounder has been studied exhaustively for decades. There are many ways studies have been designed to determine its impact.For example: Examining the predictive value of IQ tests between siblings in the same household (who generally have the same access to resources).Answer: IQ remains very powerfully predictive even within a household.A century of study and attempts at intervention have all pointed to an overwhelmingly clear result: It's n

douche May 26, 2016 View on HN

Nobody wants to admit it, but in broad strokes, intelligence and success is heritable.https://randomcriticalanalysis.wordpress.com/2016/05/09/my-r...

deogeo May 26, 2019 View on HN

No need to speculate - a quick peek at https://en.wikipedia.org/wiki/Heritability_of_IQ provides the answer: "The heritability of IQ for adults is between 57% and 73%"

bloppe Dec 15, 2025 View on HN

IQ is not "mostly random". It's highly correlated with the quality of your education. Kind of like how height is highly correlated with childhood nutrition, and sporting ability is highly correlated with practicing sports.The article is about how hard it is to tease these confounding factors apart. A highly intelligent parent is likely to prioritize their children's education. A hypothetical study that concludes "intelligent parents raise intelligent children" co