Membership Admission

Note: USIA Membership is free of charge and this policy has not been changed since 2007.


1. Esoteric Sigma Intelligence Society (Experimental)

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

There are two requirements or one alternative to be qualified for the ESI Society.

1) Requirement 1: Evidence of one standardized I.Q. test score estimated by a licensed psychologist (full formal documentation) as the full scale/battery at, or above, I.Q. 4 S.D. (or 4 sigma), 1st attempt only. No 2nd attempt scores permitted. Please see 4. Note.

2) Requirement 2: Evidence of one score from a standardized I.Q. test at, or above, I.Q. 180 S.D. 16 at 1st attempt only. No 2nd attempt scores permitted. All calculated and extrapolated by a clinical psychologist Ph.D. or psychiatrist M.D., or evidence one result of an independent intelligence test at, or above, I.Q. 180 S.D. 16, calculated and extrapolated by a clinical psychologist Ph.D. or psychiatrist M.D., licensed by English speaking country, mostly in the United States.

3) Alternative: Evidence of creative/practical intelligence as having a high profile from, at least, one field in real world, e.g., world-class research achievement in each academic field, or winner in a major intellectual championship.

4) Alternative: Having one of full memberships, for selected members, from Mega Society or Omega Society of Dr. Ronald Hoeflin PhD would qualify to join ESI Society. Epimetheus Society or Prometheus Society of Dr. Ronald Hoeflin would qualify to join ESI Society, only if having one standardized I.Q. test score of 4 sigma (full scale/battery), with having a doctoral degree accredited by an English speaking university mostly in the United States or a postgraduate degree from a world-class English speaking university mostly in the United States

5) For the membership of ESI Society, please send the application to Esoteric@USIAssociation.org

*A member qualified for the full membership of the ESI Society is awarded the Fellowship (Hon) of the USIA.


2. Four Sigma Intelligence Society (Standard)

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

There are one requirement or two alternatives to be qualified for the FSI Society.

1) Requirement: Evidence of one standardized I.Q. test score, officially certified by a professional psychologist licensed by English speaking country, mostly the United States (required full documentation), as the full scale/battery at, or above, I.Q. 164 S.D. 16 at 1st attempt only. No 2nd attempt scores permitted. Please see 4. Note.

2) Alternative: Having one of the full memberships, for selected members, from Epimetheus Society or Prometheus Society of Dr. Ronald Hoeflin (for Prometheus, only if having joined before 2013 or having one standardized I.Q. test score of 4 sigma full scale/battery) would qualify to join FSI.

3) Alternative: Having a full membership of TSI with having a doctoral degree accredited by an English speaking university mostly in the United States or a postgraduate degree from a world-class English speaking university mostly in the United States would qualify to join FSI full membership. Otherwise, in case of FSI special invitation, it provides the special membership of FSI and TSI society where USIA psychometric team does not certify special member’s intelligence estimate of 4 sigma in the official certificate or document, but certifies the special membership position as an official member of FSI society.

4) For the membership of FSI Society, please send the application to FourSigma@USIAssociation.org


3. Three Sigma Intelligence Society (Standard)

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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)

There are one requirement or one alternative to be qualified for the TSI Society.

1) Requirement: Evidence of one standardized I.Q. test score, officially certified by a professional psychologist licensed by English speaking country mostly in the United States (required Full documents), as the full scale/battery at, or above, I.Q. 148 S.D. 16 at 1st attempt only. No 2nd attempt scores permitted. Please see 4. Note.

2) Alternative: Having one of full memberships, for selected members, from Triple Nine Society, or One in a Thousand Society of Dr. Ronald Hoeflin would qualify to join TSI full membership. Otherwise, in case of TSI special invitation, it provides the special membership of TSI Society where USIA psychometric team does not certify special member’s intelligence estimate of 3 sigma in the official certificate or document, but certifies the special membership position as an official member of TSI Society.

3) For the membership of TSI Society, please send the application to ThreeSigma@USIAssociation.org


4. Note

1) We only accept standardized I.Q. test score having a licensed psychologist signature, the contact information of the psychologist, and the full formal documentation of the I.Q. test score results, along with the licensed psychologist certificate. All of the test scores submitted should be contacted by each registered psychologist. Please make sure we do not accept Cattell, or MAT (Miller Analogies Test) single score, for FSI and ESI memberships.

2) A standardized I.Q. test score should be recorded in the official psychological association in each country. Unless, it is from a psychologist Ph.D. or psychiatrist M.D. of the United States. If suspected, the score provided could be confirmed via each country’s official psychological association. In the event of that, the applicant should provide all evidence to USIA membership committee, not vice versa.

3) All of the documents should be written in English language by the licensed psychologist. All applicants should have language fluency in English.

4) There are some honorary and special memberships by invitation. This kind of membership is not accepted from any application.