I.e. the idea that IQ is some innate fixed quality has evidence against it. It seems obvious that this is the case, given that people get their children tutors so they can do better at IQ tests to get into schools...
[1] https://www.psypost.org/major-iq-differences-in-identical-tw...
[2] https://www.sciencedirect.com/science/article/pii/S000169182...
> The authors note some limitations to their work. The group with “very dissimilar” education contained only 10 twin pairs. While this represents all such published individual data from the last century, it is a small sample size
Thanks, the study is interesting, but needs further research.
Actually yes there is; I have come across many people who believe this, specifically saying that IQ is fixed.
> that intelligence is an innate fixed quality
I would also disagree with this — intelligence can be increased, (e.g. through education, training, and practice), and also decreased, (e.g. by lifestyle / environment).