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ChristianKl comments on 2013 Survey Results - Less Wrong
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Some thoughts on the correlations:
At first I saw that IQ seems to correlate with less children (a not uncommon observation):
But then I noticed that number of children obviously correlate with age and age with IQ (somewhat):
So it may be that older people just have lower IQ (Flynn effect).
Something to think about:
This can be read as smarter people stay shorter on LW. It seems to imply that over time LW will degrade in smarts. But it could also just mean that smarter people just turn over faster (thus also entering faster).
On the other hand most human endeavors tend toward the mean over time.
Older people (like me ahem) either take longer to notice LW or the community is spreading from younger to older people slowly.
This made me laugh:
Guess who does the voting :-)
In the data set older people have a significantly higher IQ than younger people. The effect however disappears if you start to control for whether someone lives in the US.
US LW users are on average more intelligent and older.