Why don't you plan to leverage the multitude of quality psychological tests?
The first two and most obvious are a personality and an IQ test. For personality, psychologists usually use the big five factor test, which can be found online with a well-calibrated question set e.g. here: http://www.personalitytest.net/ipip/ipipneo1.htm
We’ve had quite a bit of discussion around LW, and OB, on the questions:
Rationalists that we are, it’s time to put our experiments where our mouths are. So here’s my plan:
Step 1: Assemble a set of questions that might possibly help us understand: (a) how rational people are; (b) where they got that rationality from; and (c) what effects their rationality has on their lives. Include any questions that might help in the formulation of useful conjectures. After collecting the data, look for correlations, spaghetti-at-the-wall style. Try factor analysis.
Step 2 [Perhaps after iterating the quick-and-dirty Step 1 correlational approach a bit, to develop better candidate metrics]: Run some more careful experimental tests of various sorts, both with a “rationality training group” that meets for extended periods of time, and, if LW is willing, with shorter training experiments with randomized LW subgroups. Try to build an atmosphere and knowledge base on LW where more people go out and do useful experiments.
I have an initial questionnaire draft below, although I skipped the answer-choices for brevity. Please post your suggestions for informative questions include and/or to drop. As good suggestions come in, I’ll edit the questionnaire draft to include them. It would be nice if the questionnaire we actually use draws on the combined background of the LW community.
Please also post hypotheses for what kinds of correlations you expect to see and/or to not see, when the questionnaire is actually run. If you note your hypotheses now, before the data comes in, we’ll know we should increase our credence in your theory instead of just accusing you of hindsight bias.
Once we have a good questionnaire draft, I’ll put the questionnaire on the web and call for LW readers to fill out the questionnaire. I’ll also try to get people to fill out the questionnaire from some non-LW groups, e.g. Stanford students. Then I’ll post the questionnaire data, and we can all have fun interpreting it.
Section A. Demographic information. Possible confounders, i.e. variables other than “rationality” that may influence correct beliefs.
Section B. Educational variables that may help cause rationality.
Section C. Indicators of real-world success.
Section D. Standard heuristics and biases questions
[Several standard questions, and variations on standard questions, that I’d rather not give details on so I don’t cause LW readers to get them right. The goal here is to find ways of testing for standard biases among people who have read the standard articles. If anyone has clever ideas for how to disguise the questions, please do email your ideas to annasalamon at gmail, and please don’t post your ideas in the comments.]
Section E. Current beliefs
[Why: to see how good people are at forming accurate beliefs. And to get a bit of information on whether the above beliefs are accurate, by seeing whether the beliefs correlate with other rationality-indicators.]
Section F. Value placed on truth
Section G. Attempts to seek information
Section H: Models of one's own thinking skill [This is the only section with open-ended rather than multiple-choice questions. Respondants can skip this section while filling out the rest]
ADDED: The idea here is not to generate an actual, first-round test of individuals' rationality. The idea is to take a bunch of questions that might plausibly correlate with that nebulous mix of concepts, "rationality", and to see how well those questions correlate with one another. We won't get a "your're more rational than 70% of the population" out of this questionnaire: no way, no how. We may well get a some suggestive data about clusters of questions and answers where respondants' answers tend to correlate with one another, and so suggest possible underlying factors worth more careful investigation.
Psychologists often do cheap, bad studies before they do slow, careful, expensive studies, to get an initial look at what might be true.