>>10891481>environment has the biggest impactnonshared environment and developmental noise are counted as “environment” there is near certainty as to whether a child will develop into an intelligent adult based on early tests which is why it is such a shame we do not allow universal testing in primary school to focus resources on students that will require more challenging courses or extra help with rudimentary subjects.
>>10891492Are you familiar with why heritability increases? The brain is more susceptible to negative external conditions during adolescence and early childhood, most people exist in stable environments which they begin to select more specifically for their needs and goals. It does not mean that people are highly changeable at a young age only that any interventions meant to prevent very poor outcomes must happen at that time or nothing will help. A person who tests at 3 SD as a 9 year old will be around 3 SD as a college senior.
Child prodigies are not at all a good example, these tests are not even formulated to deal with anything >145 and the score becomes more and more meaningless past that threshold as the differences between these people are negligible.
