Stop guessing at four letters.
A 96-question cognitive function test built on Jung's eight functions and the Grant/Brownsword stack model. You get the mechanism — a ranked profile, a stack you can inspect, and an honest confidence reading — instead of a label with no explanation.
The eight cognitive functions
Every type is a specific ordering of four of these eight.
Ni — Introverted Intuition
Convergent foresight — many possibilities collapse into one inevitable pattern.
Ne — Extraverted Intuition
Divergent possibility — one stimulus, an explosion of what-else.
Si — Introverted Sensing
Subjective impression, stored and compared — the world against your internal reference.
Se — Extraverted Sensing
Unmediated contact with the present — what is actually here, right now.
Ti — Introverted Thinking
First-principles internal logic — build the model yourself, or trust nothing.
Te — Extraverted Thinking
External structure — measure it, sequence it, make the outcome happen.
Fi — Introverted Feeling
Private value hierarchy — what is right, regardless of what is wanted.
Fe — Extraverted Feeling
Relational field awareness — read it, hold it, move it.
The sixteen type stacks
INTJ
The Architect
Ni · Te · Fi · Se
INTP
The Logician
Ti · Ne · Si · Fe
ENTJ
The Commander
Te · Ni · Se · Fi
ENTP
The Debater
Ne · Ti · Fe · Si
INFJ
The Advocate
Ni · Fe · Ti · Se
INFP
The Mediator
Fi · Ne · Si · Te
ENFJ
The Protagonist
Fe · Ni · Se · Ti
ENFP
The Campaigner
Ne · Fi · Te · Si
ISTJ
The Logistician
Si · Te · Fi · Ne
ISFJ
The Defender
Si · Fe · Ti · Ne
ESTJ
The Executive
Te · Si · Ne · Fi
ESFJ
The Consul
Fe · Si · Ne · Ti
ISTP
The Virtuoso
Ti · Se · Ni · Fe
ISFP
The Adventurer
Fi · Se · Ni · Te
ESTP
The Entrepreneur
Se · Ti · Fe · Ni
ESFP
The Entertainer
Se · Fi · Te · Ni
Common questions
Is this an MBTI test?
No. This is an independent cognitive function test built on Jung's eight psychological functions and the Grant/Brownsword stack model. It does not use any proprietary questions, scoring rules, or norms. Where we refer to four-letter type codes we are using the common community notation, not a licensed instrument.
Why 96 questions?
Twelve items per function gives enough resolution to separate two functions that score close together, which matters because most mistypes come from exactly that situation. It splits into four short chapters so you can see the end of each one.
Do you store my answers?
No. The entire test runs in your browser. Your answers are saved to your own device's local storage so you can close the tab and resume, and they are never transmitted anywhere. There is no account and no server-side record. You can export or delete your data at any time from the Data page.
What does "confidence" mean on the result page?
It measures how clearly your profile separates your best-fit type from the second-best. High confidence means the top type is well clear of the alternatives. Low confidence means several types are statistically close and you should read the top three, not just the first one.
Why does my result differ from what I have got elsewhere?
Usually because the other test measured something different. Comparative dichotomy questions and behavioural function questions are not two ways of measuring the same thing — they can legitimately disagree. The Mistype page exists specifically to show you where and why the two diverge.
Four chapters, ninety-six statements, about fourteen minutes.
Progress saves to your device as you go, so you can stop and come back.
Start the test