One of the latest members of the high-IQ club Mensa is a mere 4 years old, with an IQ of 159 — but psychologists warn against pulling out the Albert Einstein comparisons just yet.
“All you’re doing with IQ testing is testing within a certain age group,” Lawlis told LiveScience, explaining, “You’re saying the 4-year-old is smarter than 99.5 or 99.8 of [her] age group, but that doesn’t mean you can compare to another age group.”
Prompted by miko’s skepticism about the utility of WORDSUM (a vocab test) across subcultures, I went and looked for SAT data. My assumption was that math sections are more “culture-fair” (though from what I gather ETS tries hard in various ways to be culture-fair in general). The data was not hard to find:
You can also check the ACT results.