> IQ is NOT a measure of a thing that exists. I don't understand your concept of something "existing" or not. Do you believe that a "speed" exist ? That a "cen

> IQ is NOT a measure of a thing that exists. I don't understand your concept of something "existing" or not. Do you believe that a "speed" exist ? That a "center of gravity" exists ? That a "temperature" exist ? People who say "IQ is what IQ tests measure" sound to me like they could say "temperature is what thermometers measure". temperature does not "exist" it is molecules movements all the way down, yet it is a meaningful/useful concept. Same goes for IQ or "g factor".