Große IQ-Unterschiede bei eineiigen Zwillingen hängen mit der Schulbildung zusammen und stellen jahrzehntelange Forschung vor Herausforderungen. Wenn eineiige Zwillinge eine ähnliche Ausbildung erhalten, sind ihre IQs fast gleich denen von zusammen aufgewachsenen Zwillingen, aber wenn die Schulbildung sehr unterschiedlich ist, können ihre IQs genauso unterschiedlich sein wie die von nicht verwandten Fremden.
Major IQ differences in identical twins linked to schooling, challenging decades of research
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I’ve linked to the news release in the post above. In this comment, for those interested, here’s the link to the peer reviewed journal article:
https://www.sciencedirect.com/science/article/pii/S0001691825003853
From the linked article:
**Major IQ differences in identical twins linked to schooling, challenging decades of research**
A new analysis of studies spanning the last century finds that differences in schooling appear to explain a large portion of the IQ gap between identical twins who were raised in separate homes. The research suggests that **when these twins receive similar educations, their IQ scores are nearly as alike as identical twins raised together, but when their schooling is very different, their IQs can be as dissimilar as those of unrelated strangers**. The findings were published in the scientific journal Acta Psychologica.
I think this backs up the idea that genes determine the IQ ceiling, and nurture determines how far up to the ceiling one goes.
This is a good example of how poor states, counties, districts, neighborhoods, whatever, can get into a bad positive feedback loop.
So the twins were reared apart, meaning different people raised them. I’d argue those primary caregivers are actually more likely to influence their IQ than their schooling. I think the point of the article is to emphasize nurture is more important than nature, but for some reason is focusing on schooling…
Intelligence is much more complex than IQ
IQ tests are a test of your ability to take IQ tests, and not much else. It just so happens that is good at predicting academic success up to a point.
„The most striking finding came from the 10 pairs with “very dissimilar” educational experiences. In this group, the average IQ difference was 15.1 points.“
Certainly, worthy of further study but they had to work hard to even get what they had and 10 pairs of twins is not a lot. I have often wondered about adopted twin studies on issues like this given the reasonable probability of somewhat similar upbringing even when separated at birth.
(Edited to clarify low sample size is the concern).
So our measure of IQ is impacted by education? I’m not surprised, tbh, another structure of society that seems to advantage the privileged. We should question our understanding of what IQ is
Anybody from a inner city could tell you this
Schooling could likely affect literacy, motivation, amount of test practice, behavior during test, etc., etc. When I took the 11 Plus IQ-type test I realized what it was and did my best whereas my good friend sitting next to me messed around throughout the whole time, just like I would normally have done. Of course, he didn’t score very high and didn’t make it into the „good“ school, but his score had very little to do with his intelligence; it was his bad behavior that gave him a low score. Had he tried, he might have beaten me.
Do they measure IQ for the separated twins at the same time and with same test? If not, how do they correct for this?
IQ being an unreliable metric to measure something we can’t even accurately define but definitely hold too many biases about, it’s not surprising that studies looking at the effects of learning on IQ keep seeing that IQ is variable.
Every NFL lineman is 300lbs but not every 300 lb person is an NFL lineman. I think you need the underlying horsepower to increase the IQ through education. I’m sorry but no matter what some people just can’t do Calculus, I think we’ve all seen it in real life.