Tests & Test Scores

International Society for Philosophical Enquiry

World’s Oldest 99.9% IQ Society

This page contains answers to the most commonly asked questions about admissions and tests.  Please read through this page carefully before submitting a question.  
Due to the high volume of inquiries, we are unable to reply to emails containing questions that are answered on this page.
Minimum Age
The minimum age requirement for admission to ISPE is 18 years.
Tests and Scores Accepted by ISPE
The standardized tests and minimum scores listed below are the only tests accepted at this time.

To Apply for Admission
To apply for admission to ISPE with a qualifying test score, fill out the application found on our "Join ISPE - Apply" tab.

Reinstatement Requests
If you are a former ISPE member seeking reinstatement, send your request to the ISPE President at president@thousanders.com.  Be sure to provide (1) your full name, (2) the approximate dates of your previous membership in ISPE, (3) the physical mail and email addresses you had on file with ISPE at the time you were last a member, and (4) your ISPE member number, if known.
Admissions Questions
Should you have further admissions questions that are not answered on this page, you may send a message to the Director of Admissions at admissionsofficer@thousanders.com.

American Mensa Test Scores
American Mensa test scores on tests taken prior to April 2001 provide a numerical score. Individuals who scored 149 qualify for membership in ISPE.  Those who took the SRA Primary Mental Abilities Test prior to April 2001 and scored 149 for admission to American Mensa qualify for ISPE as well. Tests taken after that time do not provide scores; thus, they cannot be accepted. Please see the additional information provided below regarding these tests and their scores. 

Mensa Scores from Other Countries
Where a separate test is used, they are listed in the Mensa Tests section, below the Standardized Tests section. Standardized tests and scores are always accepted.

Please Note the Difference in Thresholds
Mensa requires a demonstrated IQ at or above the 98th percentile (1 out of 50 people from the general population will qualify). 
ISPE requires a demonstrated IQ at or above the 99.9th percentile (1 out of 1,000 people from the general population will qualify).

Score Reports and Documentation
Applicants must submit reports and documentation that clearly state the name of the specific test taken and the score achieved. The score reports must be from the agency, organization, or professional that issued the results. If you do not have this report, one can be obtained from them. See the information below the Qualifying Tests and Scores section for more information.





ACT (American College Testing program) taken prior to October, 1989
ACT (American College Testing program) taken after September, 1989
ATGSB (American Test for Graduate study in Business)
CTMM (California Test of Mental Maturity)
Cattell A&B combined raw score
Cattell Intelligence Test, Scale IIIB (verbal)
Cattell CFT 20-R Grundintelligenztest
GMAT (Graduate Management Admission Test)
GRE (Graduate Record Exam) combined verbal and quantitative through Sept. 2001
GRE combined verbal, quantitative and analytical, 1982 – Sept. 2001
GRE scores after Sept. 2001 are not accepted
not accepted
LSAT (Law School Admission Test) after May 1991
LSAT June 1982-May 1991
Scores of 48 or higher are accepted on all tests. During this time, the scales
48 (10-50 scale)
were changed from a 10-50 to a 10-48 scale.
46 (10-48 scale)
LSAT (Law School Admission Test) through May 1982
MAT (Miller Analogies Test)
472 scaled
85 raw 
RAIT (Reynolds Adaptive Intelligence Test)
Raven’s Advanced Progressive Matrices, Set II (APM)
Raw Score 35
Scaled Score 146
SAT Scholastic Aptitude Test (combined verbal and math) taken prior to 1995
SAT Scholastic Aptitude Test (combined verbal and math) taken  after April 1995 – (based on 2400 maximum score)
SAT Scholastic Aptitude Test taken after April 2005-(based on 1600 maximum score)
Stanford-Binet Intelligence Scale, Form L or M
Stanford-Binet Intelligence Scale, Form LM
Stanford-Binet Intelligence Scale, Form SB-IV
Stanford-Binet Intelligence Scale, Form SB-5
WAIS II, III, IV (Wechsler Adult Intelligence Scale) full Scale IQ


AGCT/GT (U.S. Army General Classification Test) taken prior to 1976
Raw 157
NGCT (Naval General Classification Test) taken 1954 through 1977 only


American Mensa Admission Test IQ – taken prior to April 2001
and SRA Primary Mental Abilities – taken prior to April 2001
Germany - IBF-S, ISA-S, BIS-HB tests
Austria ISA-S Test
Mensa UK – Standard tests and scores administered from Mensa UK are accepted with the exception of Cattell-IIIB because an insufficient ceiling is reported.


The following information is provided for your convenience to obtain your reports and documentation.  Applicants must submit reports and documentation that clearly state the name of the specific test taken and the score achieved.  They must be from the organization, agency, or professional that administered the test or the organization or agency that holds and archives the test results. 

Tests Administered by Individual Psychologists

The documentation must be provided by the psychologist on individual, clinic, or agency letterhead. It must state the candidate’s name, date of the test, name of the test, and full-scale IQ.

Tests Administered and Held by an Organization or Held and Archived by an Organization or Agency

American Mensa – email or write to the address provided under “Qualifying Scores” This applies only to scores on Mensa tests taken in 2001 or prior years and a score of 149 or higher. Mensa also administered standardized tests for admission in years prior to developing its own test.  If Mensa administered your test, contact Mensa for scores.
Mensa Austria – To obtain your documentation, you should contact the organization through their website.  

Mensa Germany – To obtain your documentation, you should contact the organization through their website. 

GMAT – Graduate Management Admission Council, 1600 Tysons Blvd. Ste. 1400, McLean, VA  22102; 866-505-6559; gmac.com

GRE – Educational Testing Service, P.O. Box 592, Princeton, NJ 08540; 609-921-9000; ets.org

SAT – SAT Program, College Board, P.O. Box 8057. Mt. Vernon, IL 62864; collegeboard.com

ACT – American College Testing, P.O. Box 168, Iowa City, IA 55240; act.org

LSAT – LSAC, Box 2000-T, Newtown, PA 18940; lsac.org

Military Tests - AGCT, NGCT – National Personnel Records Center, Attn: Military Personnel Records, 9700 Page Blvd, St. Louis Mo 63132; archives.gov/st-louis/military-personnel

MAT – Psychological Corporation, 555 Academic Cir., San Antonio TX 78204; 800-622-3231; pearsonassessments.com