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Notes -
Link to paper
The sample sizes are indeed pretty small for most of the races: only 7 / 30 have sample mean std error < 1.0 (I am referring to the raw M column):
But... there is an obvious and natural comparison to make, that pretty much everyone on either side would have in mind before looking at any specific data: Black vs White! The sample sizes here are 1.5k and 5.9k, so the sample mean error is less than 0.5. And the M difference is ~40, so actually the data does "support" HBD (given the sd gap here, it feels like understatement to say "supports" as if we just found p = 0.03 or something)
And in fact, as a bonus: there are 30 groups, and 2*norm_cdf(-4) * nCr(30, 2) = 0.02, so if we only take 8sd gaps as significant, we can make all the admissible comparisons simultaeneously with 98% certainty. The data supports, e.g.
and many other comparative IQ statements (but not all, this is a pretty conservative analysis: IQ(White Cuban) ?? IQ(Black Carribean)) that would be completely obvious to some random redneck guy.
If he'd just made a more nebulous claim like "[the] NIH Toolbox battery is fluid-intelligence loaded." (like the original paper itself conceded!), this would have been much more debatable. But instead he told a straight up untruth.
I just cannot think of a charitable take here, it seems to be a mixture between:
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