Three Sigma Associate (TSA)

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≥ IQ 145 (S.D. 15, Wechsler Scale)
≥ IQ 148 (S.D. 16, Stanford-Binet Scale)
≥ IQ 172 (S.D. 24, Cattell Scale)
≥ IQ 172 (S.D. 24, Mensa Korea Scale)

1. Requirement: Evidence of one standardized IQ test score signed by a professional psychologist (Full documents) at or above IQ 148 sd16 at 1st attempt. (Please see 4. Note.)

2. Alternative: Having one of full memberships from Triple Nine Society, or One in a Thousand Society (OATHS) would qualify to join TSA.

*Qualifications for U.S.K. Membership