The one personality model with the evidence.
When researchers study personality, this is the model they use. Five traits, each a spectrum rather than a box, and decades of studies connecting them to how people actually work. This version measures each trait with 12 questions and breaks it into three facets, because two people with the same score usually differ in the details.
60
questions
~8 min
to complete
15
facets scored
Openness
Practical → Exploratory
Appetite for new methods, abstract problems, and change.
Conscientiousness
Improvising → Disciplined
Planning, follow-through, and tolerance for loose ends.
Extraversion
Reserved → Outgoing
Where their energy comes from and how they process ideas.
Agreeableness
Direct → Warm
Default posture toward people: trust and harmony, or challenge.
Composure
Sensitive → Steady
How pressure, setbacks, and criticism land.
Spectrums, measured properly
Type systems put you in one of a few boxes, which is memorable and easy to share. The Big Five instead scores you on five continuous dimensions, which is less catchy and considerably more honest: most people sit near the middle on most traits, and the middle is real information.
Each trait here is measured by 12 statements, half of them reverse-keyed so that agreeing with everything gets you the middle of the scale rather than an inflated score. Every trait then splits into three facets. Two people can share a Conscientiousness score of 70 where one is tidy and the other simply never misses a promise; the facets are where that difference shows.
Sixty questions. No boxes.
About eight minutes, and the middle of a scale counts as an answer.
Start the Big Five test