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A comment on Scientists re-evaluating relative brain size and mammalian intelligence. Parent comment

Re:Scientists re-evaluating relative brain size and mammalia... by open0 on Sunday May 02, 2021 @12:19AM (#27012317)
I had other studies in mind (done in China) regarding that specific point, it's what I had assumed a lot of posters here were referring to because it's normally a favorite of people who are eager to jump to certain conclusions about genetics.

There are other problems with twin studies, most importantly that developmental health starts at conception which means that genetics are not the only thing that twins are sharing. Once again I'll refer you to Wikipedia for further criticisms of twin studies:

https://en.wikipedia.org/wiki/Twin_study#Criticism

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Re:Scientists re-evaluating relative brain size and mammalia... by concordDance on Sunday May 02, 2021 @07:20AM (#27014217)
The heritability estimates have also been done between biological parents, adoptive parents and their children and using comparisons between siblings and half siblings.

There have been many many papers from many angles on this over the years. The high heritability seems to be a well established fact.

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