With everyone taking the same test, even if it’s miscalibrated, people could at least see how they compare to other LWers.
There are two ways an IQ test can fail:
a) it can be miscalibrated;
b) it can measure something else than IQ.
If you only want to know your percentile in LW population, (a) is not a problem, but (b) remains. What if the test does not measure the “general intelligence factor”, but something else? It can partly correlate to IQ, and partly to something else, e.g. mathematical or verbal skills.
Also you have a preselection bias—some LWers will fill the survey, others won’t.
There are two ways an IQ test can fail: a) it can be miscalibrated; b) it can measure something else than IQ.
If you only want to know your percentile in LW population, (a) is not a problem, but (b) remains. What if the test does not measure the “general intelligence factor”, but something else? It can partly correlate to IQ, and partly to something else, e.g. mathematical or verbal skills.
Also you have a preselection bias—some LWers will fill the survey, others won’t.