Concept Of "General Intelligence" Breaks Down At Around IQ 130 (And Above)

[T]he actual concept of 'general intelligence' or 'g' - which derives from the observation that all quantitatively-measurable cognitive abilities are significantly inter-correlated - begins to break down from around IQ 130.

I repeat: the actual concept of 'general intelligence' of general intelligence (hence IQ) begins to break-down from around two standard deviations above average - in the top couple of percent of the population.

-- Bruce G. Charlton

from "Problems with measuring very high IQ"

Quoted on Sat Sep 22nd, 2012