Traitia

16 Personality Types: What the Letters Mean in Traitia

· 8 min read

People searching for “16 personality traits” are usually looking for the 16 four-letter personality types, such as INFP, ESTJ, or ENTP. The wording is understandable, but types and traits are not the same thing. A trait is a spectrum measured by degree. A type is a compact label that groups several score directions into one memorable code.

Traitia derives these codes from Big Five scores; it is not an MBTI test.

What are the 16 type codes?

Here is the answer-first list. Each link leads to a Traitia profile grounded in four displayed Big Five factors. The short description translates the factor directions into plain language; it is not a separate type theory.

Here, “higher” and “lower” refer only to which side of the IPIP instrument midpoint the score falls on. They do not mean better or worse, and they do not compare you with the population. A score near the midpoint should be interpreted with more flexibility than a score near an extreme.

Are there 16 personality traits or 16 personality types?

There are 16 possible four-letter codes in the system used on Traitia. There are not 16 separate traits.

Traitia scores five broad Big Five dimensions from your answers. Four displayed factors contribute one letter each to your type code:

The assessment also scores Emotional Stability, the fifth Big Five factor. Traitia deliberately does not display that score as a letter, category, or number because doing so could read as more clinical than a self-reflection tool should.

Four factors with two possible letter directions produce 16 combinations. The code is therefore a shorthand for where four scores sit relative to the assessment scale’s midpoint. It is not a diagnosis, a complete personality description, or proof that a person belongs in a fixed category.

You can read the full scoring and evidence boundaries on the methodology page.

Why do the letters look like Myers-Briggs codes?

The letters are familiar because the same 16 codes are widely associated with Myers-Briggs descriptions. The official Myers-Briggs framework explains them through four preference pairs: Extraversion or Introversion, Sensing or Intuition, Thinking or Feeling, and Judging or Perceiving.

Traitia’s measurement underneath the code is different. It starts with IPIP Big Five factor scores rather than attempting to administer or reproduce the Myers-Briggs assessment. The letter label makes a multidimensional result easier to remember and gives readers a practical route into comparisons, but the score remains the more informative part.

This comparison has a research basis, but it does not make the systems interchangeable. McCrae and Costa’s 1989 study found that the four MBTI indices related to four major dimensions in a Five-Factor Model, while finding no support for treating the preferences as sharply separate personality categories. Traitia uses that overlap cautiously: the letters are an index over continuous Big Five scores, not a claim that two instruments produce the same result.

This means two cautions are important:

  1. Do not assume a Traitia code is an official MBTI result.
  2. Do not discard the individual trait scores once you have the code.

Two people can receive the same four letters while sitting at different distances from each midpoint. Someone barely above the Extraversion midpoint and someone near the top of the scale share an E, but their everyday patterns may not look equally strong.

How should you read your result?

Start with the factor scores rather than jumping straight to a profile summary. For each displayed factor, ask three questions:

  1. How far is the score from the midpoint?
  2. In which settings does that pattern show up consistently?
  3. When does the same pattern help, and when does it create friction?

Suppose your Conscientiousness score contributes a J. That may correspond with planning and reliable follow-through. In a changing situation, the same pattern may make it harder to abandon an established plan. A P result can support adaptability and open-ended exploration while making repetitive completion harder to sustain. Neither letter wins in every context.

Use the code to locate relevant reading, then use the underlying scores to decide how strongly that reading applies. The personality strengths and weaknesses guide offers a practical way to turn a score into a context map rather than a fixed label.

What if two codes both seem accurate?

Look at the letter on which the two codes differ and return to that factor score. If the score is close to the midpoint, recognizing patterns from both descriptions is unsurprising.

Then compare the types through the factor doing the work. Someone weighing INFJ and INFP can use the INFJ vs. INFP comparison to focus on Conscientiousness rather than comparing two unrelated lists of adjectives. Someone weighing INTJ and INTP can do the same with the INTJ vs. INTP comparison.

Context can also change visible behavior. A flexible person can build strict routines for work that matters. A reserved person can become a skilled presenter. Learned behavior does not make the trait result false, and the trait result does not limit what someone can learn.

What can a personality type tell you?

A well-interpreted result can give you language for recurring patterns. It can help you notice what restores energy, which information attracts attention, how interpersonal considerations enter decisions, and how naturally structure organizes your behavior.

It cannot diagnose a mental health condition, measure intelligence, excuse harmful behavior, or determine a career or relationship. It also cannot replace direct observation, feedback, professional advice, or knowledge of a person’s circumstances.

Treat the result as a structured hypothesis. Compare it with repeated experience, test small adjustments, and revise your interpretation when the evidence does not fit.

Frequently asked questions

What are the 16 personality traits called?

They are more accurately called 16 personality types or type codes: ISTJ, ISFJ, INFJ, INTJ, ISTP, ISFP, INFP, INTP, ESTP, ESFP, ENFP, ENTP, ESTJ, ESFJ, ENFJ, and ENTJ. Traitia derives those codes from four displayed IPIP Big Five factor scores.

Is Traitia an MBTI test?

No. Traitia does not administer the Myers-Briggs Type Indicator. It uses public-domain IPIP Big Five items and translates four displayed factor scores into familiar letters. The methodology page explains the calculation and its limits.

Can your personality type change?

Answers, circumstances, and behavior can change over time. Scores near a midpoint can also cross it on another assessment, changing a letter even when the underlying difference is small. Compare the factor scores and long-term patterns rather than treating one code as permanent.

Is one personality type better than another?

No. Each score direction can support useful behavior and create predictable costs. The practical goal is to use your tendencies well and adapt when a situation requires a different response.

How can I find my type?

Take the free personality test, review all four displayed factor scores, and then use the resulting code as an index into the type profiles. Keep the score distances in view as you read.

Sources

MBTI and Myers-Briggs are trademarks of The Myers-Briggs Company. Traitia is not affiliated with or endorsed by it.