What is Mensa? — Entry Criteria and How It Differs from Typical IQ Tests
Have you heard of "Mensa membership"? Some people list it in their SNS bios; the media sometimes describes Mensans as "the IQ-140+ genius club." This article covers what Mensa actually is, the entrance criteria, and—most importantly—how it differs from typical IQ tests (including iqcompass).
What is Mensa?
Mensa is an international society for those scoring in the top 2% on a Mensa-approved IQ test, founded in the UK in 1946. With branches in over 100 countries and roughly 140,000 members worldwide.
The founding purposes are clear: "to identify and foster human intelligence for the benefit of humanity," "to encourage research in the nature, characteristics, and uses of intelligence," and "to provide stimulating intellectual and social opportunities for its members." In short, Mensa is a social community for intelligent people—not a privilege body or economic benefits provider.
Entrance criteria
To join, you must score in the top 2% on a Mensa-approved IQ test. With a standard deviation of 15, this corresponds to IQ 130+.
Most national Mensas hold entrance tests several times a year. If you pass, you can join. The test is roughly 40 minutes long, focused on abstract reasoning in the Cattell / Raven style.
Test content
The typical Mensa entrance test consists of:
- Figural pattern recognition (Raven progressive matrices)
- Number sequence reasoning ("what comes next?")
- Figure rotation / symmetry
- Verbal extraction (odd one out)
All measure pure abstract reasoning that requires no prior knowledge. School-learned knowledge and life experience aren't useful—which is why it's said to measure "innate intelligence."
Pros & Cons of joining Mensa
Pros
- Intellectually curious network: events, online groups for stimulating connections
- SIGs (Special Interest Groups): math, philosophy, sci-fi, chess subgroups
- Self-affirmation: objective certification of being top 2%
- Research / education participation: opportunities in Mensa Foundation projects
Cons
- Annual fee (varies by country, typically ~$50-100/year)
- Test fee (typically $50-100)
- Re-test waiting period: usually 1 year if you fail
- "Just being a member" achieves nothing: you must actively engage
- Critical voices: "measuring intelligence purely through Raven-style abstract reasoning is biased"
Mensa vs. typical IQ tests — the key difference
The Mensa test and ordinary IQ tests (like iqcompass) differ fundamentally in design philosophy, measured scope, and purpose.
1. Measurement scope
| Aspect | Mensa Test | Professional IQ Tests (iqcompass etc.) |
|---|---|---|
| Axes | Figural reasoning dominant (1-2 axes) | 5 axes (figural / numerical / verbal / spatial / memory) |
| Philosophy | Pass/fail (top 2% or not) | Profile analysis (strength/weakness visualization) |
| Format | Raven / Cattell abstract patterns | CHC theory-based multi-factor |
2. Purpose
Mensa is about pass/fail. Membership is the entire result; the information provided is the same whether you barely pass or comfortably exceed the threshold.
Professional IQ tests, by contrast, are about mapping your self-understanding. They visualize which axes peak and which lag multi-dimensionally. Directly applicable to career choice, study method, interpersonal strategy.
3. High Mensa score ≠ excellence in all areas
Because the Mensa test is figural-reasoning-heavy, someone "great at Raven but weak at verbal analogy" can still pass. Conversely, people with outstanding verbal analogy or memory may fail Mensa.
Mensa membership ≠ universal excellence. It guarantees "abstract pattern recognition in the top 2%" only.
Which should you take?
Take Mensa if you…
- Want to compete in abstract reasoning
- Want a network of intellectual peers
- Want objective "top 2%" certification
- Can afford the test fee and annual dues
Take a professional IQ test if you…
- Want to understand your strengths/weaknesses per axis
- Want to inform career choice and learning style
- Want to start free
- Care about self-understanding rather than pass/fail
Recommended sequence
For most people: first take a professional 5-axis IQ test, then challenge Mensa if your figural reasoning is strong.
A free 5-axis test acts as good preparation for Mensa too. If figural reasoning scores in the top 5% (IQ 125+), Mensa entrance is genuinely within reach.
Start with the free test
The free iqcompass IQ test (Japanese only) measures 5-axis scores and total IQ in 40 questions / ~15 minutes, combined with a mini-MBTI quiz for 64-type classification.
It uses the Wechsler-method deviation IQ (mean 100, SD 15), directly comparable to Mensa-style scores. If you score IQ 130+, you're likely in Mensa entrance range.
Summary
- Mensa = international social club for top 2% IQ (130+) members
- Entrance test is figural-reasoning-heavy; pass/fail is everything
- Professional IQ tests (iqcompass) visualize 5-axis profile—self-understanding is the goal
- The two have different design philosophy, scope, and purpose. Not competing, but complementary
- The modern starting point of self-analysis: take a free 5-axis test first