Bad eyesight gene may heighten IQ, or the genes are intercorrelated somehow. So the arrow can go both ways. I would think that humans think in clusters rather that A -> B.
Re the correlation between nearsightedness and IQ. Someone on Scott's blog post re Ashkenazi IQ mentioned that the blindness gene has a correlation with High-IQ.
No real politics behind the correlation (which is why OP used it as an example) so my prior would be high; though I would have to check the trail to see if the findings stand ... (read more)
Bad eyesight gene may heighten IQ, or the genes are intercorrelated somehow. So the arrow can go both ways. I would think that humans think in clusters rather that A -> B.
Re the correlation between nearsightedness and IQ. Someone on Scott's blog post re Ashkenazi IQ mentioned that the blindness gene has a correlation with High-IQ.
https://www.hindawi.com/journals/joph/2015/271746/
No real politics behind the correlation (which is why OP used it as an example) so my prior would be high; though I would have to check the trail to see if the findings stand ... (read more)