ESA: Extreme Sigma Associate Society

~ United Sigma Korea

≥ IQ 175 (S.D. 15, Wechsler Scale)
≥ IQ 180 (S.D. 16, Stanford-Binet Scale)
≥ IQ 220 (S.D. 24, Cattell Scale)
≥ IQ 220 (S.D. 24, Mensa Korea Scale)

ESA is the 5 sigma intelligence society of the United Sigma Intelligence Association.

*Qualifications for ESA Membership