What the MBTI-style measures
The 16 Personalities framework originates from Carl Jung's theory of psychological types, which posited that humans experience the world using four principal psychological functions: sensation, intuition, feeling, and thinking. This was later expanded into the 16-type indicator system. John Beebe further advanced this by mapping an 8-function archetypal model, exploring not just a person's dominant and auxiliary functions, but their entire "cognitive stack," including their shadow functions.
The dimensions it assesses
- The Four Dichotomies:
- Extraversion (E) vs. Introversion (I): Source and direction of energy expression.
- Sensing (S) vs. Intuition (N): Method of perceiving information.
- Thinking (T) vs. Feeling (F): Method of processing information and making decisions.
- Judging (J) vs. Perceiving (P): Method of organizing the external world.
- The 8 Cognitive Functions: Extroverted/Introverted expressions of Thinking, Feeling, Sensing, and Intuition.
What to do with your result
- Capitalize on Dominant Functions: Understand that your primary functions are your greatest assets. Ensure your career and daily life allow you to use these naturally without exhaustion.
- Develop the Inferior Function: Your 4th function often acts as an "Achilles heel". For example, if you are an INTP (Inferior Fe), actively practicing empathy and social connection can prevent feelings of isolation.
- Shadow Function Awareness: Recognize when you are operating out of your "shadow" (e.g., an ENFJ becoming highly critical and pedantic under stress via shadow Ti/Te). Use this as an early warning system for burnout.
- Interpersonal Communication: Use the framework to understand colleagues and partners. Recognize that different types process information fundamentally differently, preventing conflict caused by misunderstandings.
How reliable is the MBTI-style?
None is stated, because none has been established for this item set. An internal-consistency coefficient previously appeared here with no source, no sample and no study behind it, and it has been removed rather than restated. The substantive point it was standing in for is sound and needs no coefficient: work on type-based instruments generally finds the underlying dimensions behave as continuous traits, and that sorting people into discrete types is the least reproducible part of the exercise.
Common questions about the MBTI-style
- What does the MBTI-style measure?
- 16 Personality Types assessment coupled with an 8 Cognitive Function Stack analysis (Fe, Fi, Te, Ti, Ne, Ni, Se, Si).
- Can the MBTI-style diagnose me?
- No. 16 Personality Types (MBTI-style) is a screening questionnaire, not a diagnostic tool. It can flag that something may need a closer look. It cannot tell you what is causing it. It describes tendencies rather than diagnosing anything, and no result here is a condition or something to fix.
- Is this MBTI-style test really free?
- Yes. No account, no email address, no payment. Psychometrics Today is funded by donations rather than advertising, which is also what allows us to publish instruments whose authors permit free but non-commercial use.
- Are my answers stored or shared?
- No. Your answers are scored inside your browser and never sent to us. There is no database of responses, because we never receive any. Closing the tab erases them, which is why results cannot be recovered afterwards.
- How often should I retake the MBTI-style?
- Traits and preferences move slowly, so retaking this every few months is more informative than retaking it often. Larger shifts usually follow a genuine change in circumstances.
- How accurate is the MBTI-style?
- None is stated, because none has been established for this item set. An internal-consistency coefficient previously appeared here with no source, no sample and no study behind it, and it has been removed rather than restated. The substantive point it was standing in for is sound and needs no coefficient: work on type-based instruments generally finds the underlying dimensions behave as continuous traits, and that sorting people into discrete types is the least reproducible part of the exercise.
- Why can I not take the MBTI-style here?
- Both the MBTI items and the 16Personalities instrument are proprietary. Jungian cognitive-function theory itself is not. We will not reproduce a questionnaire we have no right to reproduce, so this page explains what it measures instead. Open Extended Jungian Type Scales (OEJTS), free to use, measures the same four dichotomies.
Sources
Rights held by The Myers-Briggs Company (MBTI trademark); "16Personalities" is NERIS Analytics. Developed and validated by the researchers cited below.
- Jung, C. G. (1921). Psychological Types. Collected Works of C.G. Jung, Volume 6. Princeton University Press.
- Myers, I. B., & McCaulley, M. H. (1985). Manual: A guide to the development and use of the Myers-Briggs Type Indicator. Consulting Psychologists Press.
- Beebe, J. (2006). Evolving the Eight-Function Model. TypeFace, 17(2), 8-11.
- McCrae, R. R., & Costa, P. T. (1989). Reinterpreting the Myers-Briggs Type Indicator from the perspective of the five-factor model of personality. Journal of Personality, 57(1), 17-40.
Licensing
restricted. Both the MBTI items and the 16Personalities instrument are proprietary. Jungian cognitive-function theory itself is not.