Earlier quoted context omitted.
Since it is also herritable, why would that be surprising?
The correlation is environment, not heredity. Twin studies. Please do not push any further toward the underlying message of white/western supremacy.
To argue that genetics plays an insignificant role in executive function is to pervert the science so far as to basically be a lie.
As for my white Western supremecy message, I'll try to pass along your recommendation to my biracial children.