I tried to look up graphs of the iq gap over time but such data is harder to find than it was five years ago. I did find that the convergence of math scores see

I tried to look up graphs of the iq gap over time but such data is harder to find than it was five years ago. I did find that the convergence of math scores seems to have slowed down or stopped though: https://upload.wikimedia.org/wikipedia/commons/5/57/NAEP-longterm-Black-math-ss09-17.gif https://upload.wikimedia.org/wikipedia/commons/5/57/NAEP-lon... For the American "black"-"white" IQ gap itself (and I think it's very important to specify American, as conclusions about "blacks" in the USA are likely to be very misleading if applied to Botswanans for example) the I found a few seemingly contradictory studies, but it looks like the childhood gap is closing quickly (3+ IQ points per decade) while the adult gap is closing much more slowly (<1 IQ point per decade). Do you have any good sources on this?