How this works

What the test measures, where the questions come from, and how much to trust a four-letter result.

Where do the questions come from?

The statements are adapted from the International Personality Item Pool, a public-domain set of personality items developed for research use. They measure four broad traits: extraversion, openness, agreeableness and conscientiousness. We then map those onto the four Jungian scales that give you your letters. We didn't write the questions from scratch. Questions with no research behind them are just guesses with a score attached.

The source items are published at ipip.ori.org.

How accurate is a four-letter personality type?

Useful, but hold it loosely. Personality traits are a sliding scale. Most people sit somewhere along each one, not at either end, so four letters leave a lot out. If you land near the middle of a scale, that letter can flip on another day. That happens with any test that turns a sliding scale into a letter. It's why we show how strongly you lean on each scale and mark the close calls, instead of just handing you four letters.

Is this the official MBTI® test?

No. The Myers-Briggs Type Indicator® is a separate, paid test owned by The Myers-Briggs Company, and we have nothing to do with them. Our test uses the same four Jungian scales, with our own questions based on free, public research. Your result here won't necessarily match an official MBTI® result.

Is the test free?

Yes, completely. No sign-up, no paywall and no email needed to see your type. Your answers are scored in your browser and aren't stored.

What this isn't

It isn't a mental health test, a clinical tool or a diagnosis, and it can't tell you whether anything is wrong. It describes normal differences in how people work. If you're going through something hard, please talk to a therapist, counsellor or doctor. A result here doesn't say anything about that.

Can your personality type change?

Yes, over time. These descriptions are about habits, not fixed traits. A type is useful as a starting point for thinking about yourself. It stops being useful when it becomes a reason you can't change. People do change, and the label is a lot less fixed than four capital letters make it look.