How did it come to be that 140 (SD15) was made the "genius" IQ cut-off? Is it just something they arbitrarily generated when looking at the rarity and saying "yeah, that's good enough" or something?
Should be 130 given it's the same distance from average as legally retarded
>>9136658
Exactly tho.
>>9136658
No, it has to do with the quality of the individuals at that level.