Four Sigma Intelligence Society (Standard)

FSK Society

≥ IQ 160 (S.D.15, Wechsler Scale)
IQ 164 (S.D. 16, Stanford-Binet Scale)
≥ IQ 196 (S.D. 24, Cattell Scale)
≥ IQ 196 (S.D. 24, Mensa Korea Scale)

The FSI is the 4 sigma high intelligence society of the United Sigma Intelligence Association. For the membership of FSI Society, please send the application to