This is great! I hope there's a big response.
It seems likely you're going to get skewed answers for the IQ question. Mostly it's the really intelligent and the below average who get (professional) IQ tests - average people seem less likely to get them.
I predict high average IQ, but low response rate on the IQ question, which will give bad results. Can you tell us how many people respond to that question this time? (no. of responses isn't registered on the previous survey)
I was wondering if the IQ-calibration question was referring to reported or actual IQ. It seems to be the latter, but the former would be much more fun to think about.
Also, are so many LWers comfortable estimating with high confidence that they are in the 99.9th percentile? Or even higher? Is this community really that smart? I mean, I know I'm smarter than the majority of people I meet, but 999 out of every 1000? Or am I just being overly enthusiastic in correcting for cognitive bias?
The final straw was noticing a comment referring to "the most recent survey I know of" and realizing it was from May 2009. I think it is well past time for another survey, so here is one now.
Click here to take the survey
I've tried to keep the structure of the last survey intact so it will be easy to compare results and see changes over time, but there were a few problems with the last survey that required changes, and a few questions from the last survey that just didn't apply as much anymore (how many people have strong feelings on Three Worlds Collide these days?)
Please try to give serious answers that are easy to process by computer (see the introduction). And please let me know as soon as possible if there are any security problems (people other than me who can access the data) or any absolutely awful questions.
I will probably run the survey for about a month unless new people stop responding well before that. Like the last survey, I'll try to calculate some results myself and release the raw data (minus the people who want to keep theirs private) for anyone else who wants to examine it.
Like the last survey, if you take it and post that you took it here, I will upvote you, and I hope other people will upvote you too.