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> The investigators found that pairs of twins who had parents with higher levels of education and higher family incomes have similar results to each other, rega
by danparsonson 3y ago
> The investigators found that pairs of twins who had parents with higher levels of education and higher family incomes have similar results to each other, regardless of whether they were identical or fraternal. These observations suggested that familial environment was more likely to influence metacognitive abilities than genetics.
Do they? Couldn't this alternatively show that metacognitive abilities are more broadly heritable? I would've thought that a twin study where identical twins were raised in different environments would be far more instructive?
What am I missing here?
- littlestymaar 3y ago> I would've thought that a twin study where identical twins were raised in different environments would be far more instructive? Both are instructive, but identical twins raised in different environment is a very small group compared to the other group, and there's a very strong confounding factor between them that's likely to have a massive impact on the later results: being separated from you twin brother/sister indicates you've had some pretty chaotic early life.
- drowsspa 3y agoAnd isn't the womb an environment already?
- littlestymaar 3y agoDefinitely (the most obvious illustration of this are alcohol or tobacco use during pregnancy, but there's likely millions of other factor playing a role as well).