Sixteen types.One of them is yours.

Learn the cognitive functions behind the four letters, and what your type actually means for your relationships, your career, and the places you keep getting stuck.

I don't know my type

Take the free test. You'll get your four letters, your function stack, and the types people most often confuse yours with.

Take the free test

I know my type

Go straight to your guide: functions, growth, relationships, careers, and the characters who share your type.

Pick your type

Find your four letters.

Grouped by temperament, the pattern underneath the letters, and marked with each type's dominant function, the mental process it leads with.

All 16 types

NF Idealists Meaning, growth, human potential.

INFJThe Sage ENFJThe Mentor INFPThe Dreamer ENFPThe Advocate

NT Intellectuals Competence, systems, long-range logic.

INTJThe Strategist ENTJThe Commander INTPThe Theorist ENTPThe Visionary

SP Artisans Action, freedom, the present moment.

ESFPThe Performer ISFPThe Artist ESTPThe Maverick ISTPThe Artificer

SJ Guardians Duty, continuity, looking after their own.

ESFJThe Caregiver ISFJThe Defender ESTJThe Overseer ISTJThe Archivist

The circle on each card is that type's dominant function: Ni is introverted intuition, Te is extraverted thinking, and so on. Want the full system? Read The Code.

Torn between two types?

Almost everyone is at first. Tests measure what you say about yourself, and most of us describe the person we're trying to be rather than the one running the show.

A one-on-one session with James works through your cognitive functions in conversation, until the answer stops being a guess. You leave knowing your type, and knowing why.

Common mix-ups