Yes they do. Not that it ever stopped people from making claims about having higher IQ.
IQ 160 means that you are 1 in 30,000 of your age group. That means that to calibrate a test that can measure that high, the authors had to test more than 30,000 people in each age group (depending on what statistical certainty you need, but it could be 10x the number for reasonable values). Not sure how large the age groups typically are, but the total number of people necessary for calibration is counted in millions. You have to pay them all for participating in the calibration, and that's not going to be cheap.
And with values greater than IQ 160, the numbers grow exponentially. So I am rolling to disbelieve than anyone actually calibrated tests for such large numbers. (Especially once the numbers start to exceed the total population of Earth, which is around IQ 190.)
IQ 160 means that you are 1 in 30,000 of your age group. That means that to calibrate a test that can measure that high, the authors had to test more than 30,000 people in each age group (depending on what statistical certainty you need, but it could be 10x the number for reasonable values). Not sure how large the age groups typically are, but the total number of people necessary for calibration is counted in millions. You have to pay them all for participating in the calibration, and that's not going to be cheap.
And with values greater than IQ 160, the numbers grow exponentially. So I am rolling to disbelieve than anyone actually calibrated tests for such large numbers. (Especially once the numbers start to exceed the total population of Earth, which is around IQ 190.)