I thought that this was interesting as well, but pretty speculative given the sampling used.
Nobody IQ>140 was in the sample.
I personally suspect quite strongly that this correlates far more to sensory integration than strictly to IQ. It's just that some of those things are more common in higher IQ samples.
The other thing that I wonder is if you venture further out-- does the inability to spot large objects vanish while the greater tracking ability remains? I'm guessing that it might, as you find HG+ people who can use multiple processing channels simultaneously.
It also seems VERY obvious to me that this is likely to be a purely processing speed correlation. While that certainly matters, it's not everything, either.
