The sixteen types

No. MBTI® is a registered trademark and its questionnaire is copyrighted, so we do not use it. This is built on Carl Jung's four dichotomies — the same theory the MBTI draws on — with 32 questions of our own.

Because most people are not firmly on one side. If one of your pairs is near the line, a different mood is enough to flip that letter. The page marks pairs as borderline precisely so you can see this rather than thinking you changed.

None is better than another, and anywhere that ranks them is selling you a story. Each is a set of leanings that comes with its own strengths and its own places to stumble.

No. Even the commercial instrument is not recommended for hiring decisions, because retest reliability is not good enough for that. It is useful for a team understanding one another; it is not a filter for people.

Carl Jung's four dichotomies: where you draw energy from, which kind of information you trust, what you weigh when deciding, and whether you are more comfortable with things settled or left open. The four-letter code is those four choices put together.

MBTI® is a registered trademark of The Myers & Briggs Foundation and its questionnaire is copyrighted — this is not MBTI®. It uses the same four Jungian dichotomies with questions of our own. Even the original draws criticism from researchers for how much results move on retaking. Treat the four-letter code as a vocabulary for describing yourself, not a measurement.