This is not true afaik. IQ has been shown to not be constant through development [0,1]. So while adult/college IQ scores have been correlated with success (equ

This is not true afaik. IQ has been shown to not be constant through development [0,1]. So while adult/college IQ scores have been correlated with success (equivalents are used university admissions after all). I am not aware of any studies/data sets that show a strong correlation of IQ as measured in six year olds and adult success. Also any study tracking IQ over time is going to have significant problems with goodhart's law. [0]: https://www.psychologytoday.com/us/blog/memory-medic/201805/no-your-iq-is-not-constant https://www.psychologytoday.com/us/blog/memory-medic/201805/... [1]: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3672949/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3672949/