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.
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.
I underwent a real IQ test when I was young, and so I can say that this estimation significantly overshoots my actual score. But that's because it factors in test-taking as a skill (one that I'm good at). Then again, I'm also a little shocked that the table on that site puts an SAT score of 1420 at the 99.9th percentile. At my high school there were, to my knowledge, at least 10 people with that high of a score (and that's only those I knew of), not to mention one perfect score. This is out of ~700 people. Does that mean my school was, on average, at the 90th percentile of intelligence? Or just at the 90th percentile of studying hard (much more likely I think).
If you're in the median age band for Less Wrong, you misread the estimator. The "SAT to IQ" table is for the pre-1995 SAT, which had much more rarefied heights. The "SAT I to IQ" table is for the 1995-2005 SAT.
(I did the same thing.)