The four dichotomies
Each letter answers one question about how you prefer to operate:
- E or I: where you direct your energy. Extraversion towards people and activity; Introversion towards inner thoughts and quieter settings (see introvert or extrovert).
- S or N: how you take in information. Sensing focuses on concrete facts and present detail; Intuition on patterns, meanings and possibilities.
- T or F: how you make decisions. Thinking weighs logic and consistency; Feeling weighs values and the effect on people.
- J or P: how you deal with the outside world. Judging prefers plans and decisions made; Perceiving prefers flexibility and options kept open.
In the Myers-Briggs framework these are preferences, like being right- or left-handed, not abilities. A Feeling type can reason logically; it simply is not the first thing they reach for.
All 16 types at a glance
The one-line descriptions below are our own summaries. The percentages are the commonly cited estimates from the US national sample reported in the official manual (Myers and colleagues, 1998); they vary by country and sample.
| Type | In one line | Share in US sample |
|---|---|---|
| ISTJ | Dependable, thorough organiser who trusts facts and proven methods | 11.6% |
| ISFJ | Quiet, conscientious carer who remembers what matters to people | 13.8% |
| INFJ | Insightful idealist who looks for meaning and long-term purpose | 1.5% |
| INTJ | Independent strategist who builds long-range plans and systems | 2.1% |
| ISTP | Practical troubleshooter who learns by taking things apart | 5.4% |
| ISFP | Gentle, adaptable doer guided by personal values and the senses | 8.8% |
| INFP | Reflective idealist who acts on inner values and ideals | 4.4% |
| INTP | Analytical thinker drawn to theories and logical puzzles | 3.3% |
| ESTP | Energetic, hands-on problem-solver who acts in the moment | 4.3% |
| ESFP | Warm, spontaneous enjoyer of people and experiences | 8.5% |
| ENFP | Enthusiastic generator of ideas and possibilities in people | 8.1% |
| ENTP | Quick, inventive debater who enjoys new angles | 3.2% |
| ESTJ | Decisive manager who organises people and tasks around clear rules | 8.7% |
| ESFJ | Sociable organiser who keeps groups running and in harmony | 12.3% |
| ENFJ | Persuasive, empathetic leader focused on others' growth | 2.5% |
| ENTJ | Assertive, strategic leader who drives towards goals | 1.8% |
Three patterns stand out: the most common types combine Sensing with Judging (ISFJ, ESFJ, ISTJ), the rarest combine Intuition with Judging (INFJ, ENTJ, INTJ), and in most samples women are more often classified as Feeling types and men as Thinking types.
The evidence debate
The 16-type model is one of the most used personality frameworks in the world, and one of the most criticised by academic psychologists. The main issues are:
- Retest stability. In his review, David Pittenger (1993) reported studies in which a large share of people, in some cases around half, received a different four-letter type when retested after only a few weeks. Most people change one letter, usually on a dimension where they scored near the middle.
- Dichotomies versus continuous traits. When scores on each dimension are plotted, they form a single hump with most people near the middle, not two separate groups. Splitting at the midpoint means two people with almost identical scores can get opposite letters.
- What is missing. The four dimensions map closely onto four of the Big Five traits: E/I onto Extraversion, S/N onto Openness, T/F onto Agreeableness and J/P onto Conscientiousness (McCrae and Costa, 1989). There is no dimension for emotional stability (Neuroticism), which is one of the more predictive traits for life outcomes.
Stein and Swan (2019) conclude that the theory behind the types is not well supported, and suggest that the model's appeal rests partly on how flattering and easy to recognise the descriptions are. None of this makes the letters meaningless: they summarise real differences in extraversion, openness, agreeableness and conscientiousness. But the scores underneath the letters carry more information than the letters do.
How our 16-type test is scored
Our 16-type test is modelled on the four dichotomies of the Myers-Briggs framework; it is not the official instrument. Each statement leans towards one side of one dimension, and your answers are added up per dimension. The result shows your four-letter code together with how strongly you lean on each dimension, so a near-even split is visible and you can see which letter is most likely to change if you retake the test. If you want continuous scores on all five scientific traits, including emotional stability, the Big Five test is the better tool.
Sources
- Jung, C. G. (1921). Psychologische Typen. Rascher.
- Myers, I. B., McCaulley, M. H., Quenk, N. L. and Hammer, A. L. (1998). MBTI Manual (3rd edition). Consulting Psychologists Press.
- McCrae, R. R. and Costa, P. T. (1989). Reinterpreting the Myers-Briggs Type Indicator from the perspective of the five-factor model of personality. Journal of Personality.
- Pittenger, D. J. (1993). The utility of the Myers-Briggs Type Indicator. Review of Educational Research.
- Stein, R. and Swan, A. B. (2019). Evaluating the validity of Myers-Briggs Type Indicator theory: a teaching tool and window into intuitive psychology. Social and Personality Psychology Compass.
Frequently asked questions
what are the 16 personality types
They are ISTJ, ISFJ, INFJ, INTJ, ISTP, ISFP, INFP, INTP, ESTP, ESFP, ENFP, ENTP, ESTJ, ESFJ, ENFJ and ENTJ. Each code combines one side of four preference pairs: E/I, S/N, T/F and J/P.
what are myers briggs personality types
They are the 16 four-letter types defined by Isabel Briggs Myers and Katharine Cook Briggs, based on Jung's theory of psychological types. The official questionnaire was first published in 1962 and is sold through certified practitioners.
how many mbti types are there
Sixteen. Four dimensions with two options each give 2 × 2 × 2 × 2 = 16 combinations. Some versions add sub-scales or an extra letter, but the core system has 16 types.
what is a estj personality type
ESTJ stands for Extraversion, Sensing, Thinking and Judging. ESTJs are described as practical, decisive organisers who like clear rules, structure and getting things done, and they are among the more common types in US samples.
is intp a rare personality type
Fairly uncommon. In the US sample in the official manual about 3% of people were classified as INTP, compared with around 14% for the most common type, ISFJ. INFJ, ENTJ and INTJ were rarer still.
which of the 16 personalities is the rarest
INFJ is usually reported as the rarest, at around 1.5% of the US sample in the official manual, followed by ENTJ and INTJ. Figures differ between countries and between tests, so treat them as rough estimates.
is 16 personalities myers briggs
No. 16Personalities is a separate free website that uses the same four-letter codes but its own questionnaire, its own type names and an extra fifth scale. The official Myers-Briggs instrument is a different, paid product.
what is my mbti personality type
Only a questionnaire can suggest it, and the honest answer is a four-letter code plus how strongly you lean on each letter. If you score near the middle on a dimension, either letter may fit, so read both descriptions before deciding.