Hmm. But high LW karma indicates not only inclination to contribute, but also sucess in contributing usefully and accurately. Someone in the grip of the Dunning-Kruger effect who posts a lot of useless insight-free twaddle will get relatively little karma. So if there's no observed relationship between intelligence and LW karma, and if intelligence correlates with value of contributions, then that is evidence of something Dunning-Kruger-esque.
Someone in the grip of the Dunning-Kruger effect who posts a lot of useless insight-free twaddle will get relatively little karma.
How do you know? (Genuine question.)
Precommitted to publishing this in Discussion to fight publication bias. It looks like intelligence (as measured by IQ, SAT scores, etc.) isn't meaningfully related to how much one posts to LW. Probably in the ideal case, they would be related and higher-IQ people would post more, but that doesn't appear to be going on either.
How well-educated you are doesn't seem to be much related to participation either. I'm not controlling for hours spent on LW for any of this, though.
Script output:
Script source here.