3 ms·
That's the point of twin studies: comparing genetically identical subjects who grew up in different environments. The prenatal influence cannot, practically, b
by pygy_ 14y ago
That's the point of twin studies: comparing genetically identical subjects who grew up in different environments.
The prenatal influence cannot, practically, be investigated at this point in history.
- Daniel_Newby 14y agoThe prenatal influence has been directly tested. They compare pairs of non-identical siblings, some who are twins and some who are not. The same pregnancy pairs are about as similar to each other as the other pairs. So the prenatal environment either has little effect, or it has a significant but highly nonlinear effect. (Once again, this assumes no extreme hardship.)
- pygy_ 14y agoInteresting, thanks.