I took it too. Disturbs me how much my alien probability changed when framed as 'in universe' vs 'in galaxy'.
I'm not sure why it should disturb you. If the probability of intelligent life evolving in galaxy x is the same for all x, and there are about 100 billion galaxies in our observable universe, then the chance of intelligent life in the observable universe is about 1-(1-x)^100 billion. This assumes that whether life evolves in any one galaxy is independent of whether it evolved in another.
I wish I had remembered to use this formula when I took the survey.
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.