The self-selection bias is definitely something to consider. I’d guess people who feel relatively confident in their intelligence are more likely to take the test.

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zerr 3 days ago | parent [-]

Many highly intelligent people might decide that it is not worth their time though.

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kirurik 3 days ago | parent [-]

True, and many not so intelligent people may overestimate their intelligence and do it. So maybe it does somehow end up being representative.

	▲	cutemonster 3 days ago \| parent [-]
		No it does very much not end up being representative. > not so intelligent people They generally won't ever know that the test exists.