I don't think you're ever going to get anything that isn't totally useless out of a 5 minute IQ test, and I have no idea why you'd think HN has a high concentration of people that like IQ tests? I mean, maybe conceptually?

Anyways, asking for an hour of someone's time is fine. I really don't believe that dumb people would, for some reason, be particularly short on time. Maybe you're right that we won't get a fantastic sample of people working 4 jobs at once with 8 children at home.

> I don't think you're ever going to get anything that isn't totally useless out of a 5 minute IQ test

Depends what you're trying to learn, but yeah it would be difficult. That's not really relevant to whether hour-long tests are biased due to their length though.

> I have no idea why you'd think HN has a high concentration of people that like IQ tests?

Because it's full of programmers and geeks who value intelligence and generally think of themselves as more intelligent than the average person. This is really obvious IMO.

> I really don't believe that dumb people would, for some reason, be particularly short on time.

I never said they would. I said that they would be unlikely to invest that free time in an hour long IQ test.