MBTI (Myers-Briggs Type Indicator) — complete reference
The most-taken personality assessment in the world. 16 four-letter types (INTJ, ENFP, ISTP, …). Widely used, psychometrically contested.
Take the free MBTI test →Origins
Developed by Katharine Cook Briggs and her daughter Isabel Briggs Myers in the 1940s. Based on Carl Jung's theory of psychological types. Published commercially in 1962 by CPP, Inc.
The four dichotomies
- E/I — Extroversion vs Introversion (where you draw energy)
- S/N — Sensing vs Intuition (what information you notice)
- T/F — Thinking vs Feeling (how you decide)
- J/P — Judging vs Perceiving (how you order your world)
Honest note on validity
Test-retest reliability is around 0.60–0.70 — moderate. The dichotomies are actually continuous distributions, so the 'binary type' framing is a simplification. Career prediction validity is lower than Big-5 or Holland. Useful as a self-reflection tool; less useful as the sole basis for a career decision.
Frequently asked questions
Is MBTI scientifically valid?
It's the most widely used personality instrument globally, but psychometrically contested. Test-retest reliability sits around 0.60–0.70. Big-5 has stronger academic backing; MBTI has better cultural adoption.
Can my MBTI type change?
Officially, no — MBTI theory says your type is stable. In practice, retesting the same person shows a ~50% chance of getting a different four-letter type. That's why it's more useful as a starting-point conversation than a fixed diagnosis.