> 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 ide

> 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.