16Personalities Types: All 16 Codes and What the a or T Means

19 min read

16Personalities Types: A Quick Overview

16Personalities is a free online test run by a company called NERIS Analytics. It copies its letter format from the MBTI, the Myers-Briggs test behind the MBTI 16 types most people know, and adds a fifth letter of its own. Each of the 16Personalities types comes in two versions, so the site in practice describes 32 profiles.

The scales under the letters are not the ones Isabel Myers and Katharine Briggs used. 16Personalities says it reworked the Big Five, the model most personality researchers rely on, into five scales of its own. It also dropped the cognitive functions from Carl Jung's 1921 book Psychological Types, which the official MBTI still uses. The letters look the same as the MBTI's, while the test behind them works differently.

The five letters in 16Personalities types

Each letter in 16Personalities types is one end of a scale. You get whichever end you scored closer to.

Introverted or Extraverted (I/E)

How much you lean toward time alone or time with people.

Intuitive or Observant (N/S)

Do you trust ideas and patterns or what you can see and check? The MBTI calls the S side Sensing.

Thinking or Feeling (T/F)

Which carries more weight in a choice: logic, or how people will feel about it.

Judging or Prospecting (J/P)

A fixed plan, or room to stay flexible. The MBTI calls the P side Perceiving.

Assertive or Turbulent (A/T)

How sure you feel of your choices, and how hard you take a mistake. Only 16Personalities has this letter.

So a result like INFP-T reads: introverted, intuitive, feeling, prospecting, turbulent. The first four letters set your type, and the fifth sets which version of it you are. Two INFPs can share values and interests and still handle pressure in opposite ways.

The 16 names, grouped in fours

Want just the names? Here they are by group. The Analysts are the Architect, Logician, Commander and Debater. The Diplomats are the Advocate, Mediator, Protagonist and Campaigner. The Sentinels are the Logistician, Defender, Executive and Consul. The Explorers are the Virtuoso, Adventurer, Entertainer and Entrepreneur.

The Full List of All 16 Personality Types (With Codes and Nicknames)

This 16 personality types list doubles as a 16 personality types chart: code, nickname, group, and one plain line on what people with that code tend to be like. Use it as the at-a-glance view. A short profile of each type follows the table.

All 16Personalities types have an A and a T version, so ISTJ appears on the site as ISTJ-A and ISTJ-T. An Assertive ISTJ tends to shrug off a missed deadline and move on. A Turbulent ISTJ tends to replay it, double-check the next one, and hold a higher bar as a result.

All 16Personalities types, one by one

Each short profile below covers five things: the core drive, one strength, one blind spot, the work conditions that suit the type, and how the A and T versions differ. They are our own summaries of common descriptions, so read them as tendencies.

INTJ, the Architect (Analyst). An INTJ wants to build a plan that will still hold in five years. The strength is long-range strategy: spotting the weak joint in a system before it breaks. The blind spot is impatience with people who have not seen the same flaw yet. INTJs need long quiet stretches, real authority over their own method, and goals judged by results. INTJ-A presents the plan and moves on. INTJ-T keeps stress-testing it, sometimes past the deadline.

INTP, the Logician (Analyst). An INTP wants to understand why something works, not only that it works. The strength is clean reasoning that finds the hidden flaw in an argument. The blind spot is follow-through, since a solved puzzle stops being interesting before the paperwork is done. INTPs need open problems, freedom to explore, and few status meetings. INTP-A shares a half-built idea without fuss. INTP-T holds it back until every gap is closed.

ENTJ, the Commander (Analyst). An ENTJ wants to move a group toward a goal, fast. The strength is decisive organizing: setting the target, assigning the work and holding people to it. The blind spot is running over quieter colleagues who needed one more day. ENTJs need clear authority, measurable targets and a pace that does not stall on consensus. ENTJ-A makes the call and rarely looks back. ENTJ-T makes the same call, then checks the numbers twice.

ENTP, the Debater (Analyst). An ENTP wants to test ideas by arguing with them. The strength is invention: finding the angle nobody tried and making it sound possible. The blind spot is dropping a project once the clever part is over. ENTPs need variety, room to challenge the plan, and a partner who finishes things. ENTP-A argues for sport and forgets it by lunch. ENTP-T replays the debate that night and wonders whether it cost goodwill.

INFJ, the Advocate (Diplomat). An INFJ wants work that serves a cause they believe in. The strength is reading people closely and seeing where a situation is heading before others do. The blind spot is quiet burnout, because INFJs give a lot and say little until they are empty. INFJs need meaningful goals, a few trusted colleagues, and time alone to think. INFJ-A protects that time calmly. INFJ-T feels guilty for asking for it.

INFP, the Mediator (Diplomat). An INFP wants work that matches their values. The strength is empathy combined with original ideas, often expressed in writing or design. The blind spot is taking criticism of the work as criticism of the person. INFPs need a mission they can stand behind, flexible hours and a manager who explains the why. INFP-A shrugs off a rejected draft and tries again. INFP-T rewrites it five times before anyone sees it.

ENFJ, the Protagonist (Diplomat). An ENFJ wants to help people grow and to bring a group together. The strength is motivating others, often by seeing potential the person has not seen yet. The blind spot is saying yes to everyone and neglecting their own work. ENFJs need people-facing roles, a shared purpose and visible progress in the team. ENFJ-A gives tough feedback when it is needed. ENFJ-T softens it until the point gets lost.

ENFP, the Campaigner (Diplomat). An ENFP wants new ideas and new people, and lots of both. The strength is enthusiasm that pulls others into a project and makes it feel possible. The blind spot is the middle of a project, when the novelty fades and the routine work piles up. ENFPs need variety, creative freedom and a structure that someone else maintains. ENFP-A launches the next idea with confidence. ENFP-T worries that the last one disappointed people.

ISTJ, the Logistician (Sentinel). An ISTJ wants things done correctly and on time. The strength is reliability: accurate records, kept promises and a plan that actually gets followed. The blind spot is resisting a change before it has been given a fair test. ISTJs need clear standards, defined roles and a steady workload they can plan around. ISTJ-A shrugs off a missed deadline and moves on. ISTJ-T replays it and double-checks the next one.

ISFJ, the Defender (Sentinel). An ISFJ wants to look after people in practical, concrete ways. The strength is careful, quiet support: remembering details, covering gaps and keeping things running. The blind spot is doing extra work nobody notices, then resenting it. ISFJs need a stable team, appreciation that is said out loud and clear expectations. ISFJ-A says no when the load gets too heavy. ISFJ-T keeps saying yes and worries about letting people down.

ESTJ, the Executive (Sentinel). An ESTJ wants order, with clear rules that everyone follows. The strength is running operations: setting the process, tracking it and fixing what slips. The blind spot is treating a different way of working as a wrong way. ESTJs need defined authority, measurable goals and colleagues who keep their commitments. ESTJ-A enforces the rule and stays calm about it. ESTJ-T enforces it too, but takes pushback personally.

ESFJ, the Consul (Sentinel). An ESFJ wants a group that gets along and looks after its members. The strength is practical warmth: organizing the event, welcoming the new hire and noticing who is left out. The blind spot is avoiding conflict until it has grown. ESFJs need a cooperative team, regular contact with people and clear signs that their effort counts. ESFJ-A handles a tense meeting smoothly. ESFJ-T thinks about it all evening.

ISTP, the Virtuoso (Explorer). An ISTP wants to know how things work, often by taking them apart. The strength is calm, hands-on problem solving, especially when something has broken under pressure. The blind spot is going quiet when a team needs an update. ISTPs need tools, real problems and the freedom to work their own way without close supervision. ISTP-A trusts the first fix. ISTP-T tests it again before calling it done.

ISFP, the Adventurer (Explorer). An ISFP wants to live by personal taste and values, in the present. The strength is a strong eye for what looks, feels or sounds right, often in craft or design. The blind spot is long-range planning, which can feel like a cage. ISFPs need hands-on work, a calm setting and room to do it their own way. ISFP-A shares the work without asking for approval. ISFP-T waits for someone to say it is good.

ESTP, the Entrepreneur (Explorer). An ESTP wants action, and results they can see today. The strength is reading a room fast and acting before the moment passes, which helps in sales and in a crisis. The blind spot is skipping the details that bite later. ESTPs need pace, variety and problems that are happening now, not in next year's plan. ESTP-A takes the risk and moves on. ESTP-T takes it, then wonders whether it was smart.

ESFP, the Entertainer (Explorer). An ESFP wants fun, people and a reason to get everyone involved. The strength is warmth under pressure: putting customers at ease and lifting a tired team. The blind spot is planning, since next quarter feels far away when today is busy. ESFPs need people-facing work, variety and a manager who gives quick, friendly feedback. ESFP-A shakes off a bad day by morning. ESFP-T carries it into the next shift.

What is each personality type's nickname?

The nicknames for 16Personalities types belong to the site. The official MBTI uses only letters. David Keirsey's older temperament sorter gave the same codes a different set of names, and the two sets clash. Keirsey called INTJ the Mastermind and gave the name Architect to INTP. On 16Personalities, INTJ is the Architect and INTP is the Logician.

That clash is why a friend may swear they are an Architect while their letters say something else. If you compare results with someone, compare codes, not nicknames. The nickname is an easy handle for a long description and adds nothing beyond the code.

The 4 Personality Type Groups Inside the 16 Personality Types: Analysts, Diplomats, Sentinels, Explorers

Inside the site, 16Personalities types are sorted two ways. The first, which it calls Roles, uses two letters from the middle of the code. The second, called Strategies, uses the first letter and the last. Most sites show only the Roles, yet each grouping answers a different question about you.

What are the 4 groups inside the 16 personality types?

The Roles are the four groups on the 16Personalities type page:

• Analysts (NT): intuitive and thinking. Drawn to systems, strategy and hard problems.
• Diplomats (NF): intuitive and feeling. Drawn to meaning, people and ideals.
• Sentinels (SJ): observant and judging. Drawn to rules, duty and doing things properly.
• Explorers (SP): observant and prospecting. Drawn to action, hands-on skill and the present moment.

Notice that the rule changes halfway. The intuitive groups split on Thinking versus Feeling, while the observant groups split on Judging versus Prospecting. That pattern is older than the website. It follows Keirsey's four temperaments, which he called Rationals (NT), Idealists (NF), Guardians (SJ) and Artisans (SP).

The Roles describe what you care about. Your group says more about your goals and interests than any single letter does. That is why INTJ and INFJ, one letter apart, can feel like strangers, while an ISTJ and an ESTJ often feel like cousins.

The four Strategies: a second way to group 16Personalities types

The Strategies ignore the middle letters and look at how you go about things. They come from the first letter, I or E, and the last, A or T:

• Confident Individualism (I and A): prefers to work alone and trusts its own judgment.
• People Mastery (E and A): seeks out people and handles them with ease.
• Constant Improvement (I and T): works alone, worries about results and keeps raising its own bar.
• Social Engagement (E and T): stays busy with people and cares how others see it.

Most lists of 16Personalities types skip the Strategies. Your Role tells you what you are working toward, and your Strategy tells you how you act when things go wrong.

Which 16 Personality Types Are the Rarest?

The site does not print population shares for 16Personalities types, so almost every rarity figure online comes from the MBTI side. The most cited source is the third edition of the MBTI Manual, published in 1998, which tested a national sample of 3,009 US adults. Those figures are the closest stand-in we have, but they are not a count of the site's own users.

The four codes you meet least often

In that US sample, the least common type is INFJ at 1.5%, followed by ENTJ at 1.8%. INTJ comes next at 2.1%, then ENFJ at 2.5%. All four combine the N letter with the J letter, so the intuitive planners are the scarce corner of the chart.

ISFJ sits at the opposite end as the most common type, at 13.8%, close to one adult in seven. Our guide to all MBTI types lists every code with its share.

INFJ and ENTJ: two answers to the rarest-type question

Ask which code is rarest and you may hear two answers. In the 1998 US sample (third edition), INFJ is lowest at 1.5% and ENTJ is second at 1.8%. The 2018 global manual (fourth edition) sampled 16,773 people in 23 countries. There, ENTJ is also 1.8%, but it ranks lowest, and INFJ rises to 2.3%.

So ENTJ has the same share in both samples, and the ranking changes because INFJ is more common in the global group. Each claim is correct for the sample it describes.

A second problem matters more. Visitors to a personality website choose to be there, so any count of a site's own users leans toward whoever enjoys these tests. Treat a rarity figure as a rough guide to how often you will meet someone like you. It says nothing about talent or worth. Our full rarity ranking explains why the sources disagree.

Taking the 16 Personalities Test: How Many Questions and How Long

The 16 personalities test gives you 60 statements to rate, about how you act with people, plans and feelings. For each one you click one of seven circles, running from agree to disagree, with a neutral circle in the middle. The site says it takes about 10 minutes, and most people finish in that window if they go with their first reaction.

You do not need an account to see your type. The free result gives you the code, the A or T ending, a percentage for each scale and a long profile covering strengths, relationships and work habits. Paid products add more, including a Premium Career Suite and tools for teams. Our walk-through of the 16Personalities free personality test covers what each tier includes.

The format hides one thing: every answer is a degree of agreement. You can agree strongly that you are organized and that you are spontaneous in the same sitting. A rating scale lets you claim two opposite habits at once, and the average lands near the middle. That matters when you decide how far to trust the result.

How Scientifically Accurate 16Personalities Types Are

Accuracy has two parts. Is the result the same next time? And can it predict anything useful? On the first, the site publishes its own numbers. In its reliability study, 2,900 people retook the test after five to seven months, each scale's scores correlated between 0.74 and 0.83 with the first round. Those are respectable figures for a personality measure.

The problem is where the letters come from. Your scores are steady, but your letters come from slicing each scale at the middle. Someone near the line on Judging versus Prospecting can move a few points and land in a different type, even though almost nothing about them changed. The MBTI has the same problem. In MBTI retest studies gathered in the National Research Council report In the Mind’s Eye, between 24% and 61% of people kept their type across eleven samples.

On prediction, the evidence for type is thin. The council's 1991 chapter on career development noted how little research had tested whether self-assessment tools like the MBTI help people make career choices. 16Personalities types start from the Big Five, which puts them closer to research, but you still end up in a box, and most retest changes happen at the edges of those boxes. Our review of the 16Personalities assessment goes through its published figures one scale at a time.

The Official MBTI and 16Personalities Are Two Different Tests

The two tests share letters and little else. The Myers-Briggs Company owns the official MBTI, which you take online or through a trained practitioner, and it rests on Jung's cognitive functions. 16Personalities is a separate company's free test, built on reworked Big Five scales, with the A or T letter the MBTI does not have.

So you can get INFP on one and INFJ on the other without either test making a mistake. If you have taken both, keep both results and read the two descriptions side by side.

How to Find Your Own Type Among the 16 Personality Types

Every self-report test shares one weak spot: it can only score the person you describe. On a good week you may describe your best self, and under stress your worst. Some habits help you trust your place among the 16Personalities types.

1. Answer for most of the time. Think of a typical month, not your best day or the one after a bad one.
2. Pick a calm moment. Mood moves answers, and the A or T letter moves most of all.
3. Use the neutral circle rarely. Many neutral answers pull scales toward the middle, where letters flip.
4. Read the percentages before the code. A close call on any scale means two types are worth reading.
5. Ask someone who knows you. Read both candidate descriptions to a partner or an old friend and ask which one rings true.

If two descriptions both fit, you sit near a line, and the label matters less for you. Someone in the middle of a scale will see pieces of two types, and that is an accurate picture too.

What to Do With Your 16 Personality Types Result: Careers, Relationships, and Teams

16Personalities types work best as questions to ask about your life. Here is how that plays out in the three places people use them most.

Careers

Most 16 personality types careers lists match a code to jobs that people with that code say they like. 16Personalities keeps most of its own career material in the paid suite. An ISTJ is often pointed toward accounting, yet plenty of ISTJs do well in teaching or nursing, because what they need is clear standards and follow-through.

The better move is to translate your letters into working conditions. A strong I suggests you need long stretches of uninterrupted work. A strong P suggests a rigid schedule will chafe. A T ending suggests a harsh feedback culture will hit you harder than your colleagues. Working conditions carry across job titles, so they tell you more than a list of jobs. Our guide to MBTI and career planning walks through the method.

Relationships

In relationships, the letters are best at explaining friction. If one partner is a J who plans the weekend on Wednesday and the other is a P who decides on Saturday morning, neither is wrong. Naming the difference turns an argument about character into a question of preference. Charts that rate couples by code have little evidence behind them.

Teams

On teams, the most useful parts of 16Personalities types are often the J or P letter and the A or T ending. A manager who knows a colleague is Turbulent can give feedback early and in private, before a small doubt grows. Keep sharing types voluntary. Tests used to hire people are a separate field, and OPM, the federal hiring agency, has a page on how it uses personality tests in government hiring. A free type test does not belong in a hiring decision.

How 16Personalities Types Compare With the Big Five, Enneagram, and DISC

Each framework answers a different question, so the right pick depends on what you want to know.

Research psychologists mostly use the Big Five. It gives you scores and no type, which makes it less fun to share and more precise about where you sit. Researchers can use the free International Personality Item Pool (IPIP), a public-domain bank of Big Five items. 16Personalities types start from those same traits and then sort the scores into codes.

The Enneagram asks why you do things more than how. Our guide to all nine Enneagram types covers each one. DISC is narrower and made for the workplace, and our page on DISC model personality types shows how to spot each style at work.

For a career decision, keep one limit in mind. None of these four frameworks was built to point you toward a line of work. They describe you, and turning a description into a direction takes another step.

Why a Forced-Choice Career Test Can Go Further Than the 16 Personality Types

Every one of the 16Personalities types comes from a rating scale, and rating scales share one habit: people mark themselves up on traits they admire. Ask someone whether they are organized, creative and flexible, and many will agree with all three. The result mixes how they work with how they hope they work.

A forced-choice test takes that option away. Each item sets a few ways of working next to each other and asks you to rank them. Would you rather finish a report alone by Friday, or talk it through with the team on Monday and finish it later? You cannot put both first, and the order you settle on is the useful part. Ranking ways of working shows what you do when you cannot have everything.

Pigment's career test is built this way. It is a forced-choice career assessment of about 120 questions, and it scores each trait as a position along a line, so one or two answers cannot flip you into a new label. It also measures what keeps a job satisfying after the novelty fades, alongside what you are good at. Your results name your strongest traits, the kinds of work that use them, and the team, pace and setting you tend to last longest in.

It does not replace 16Personalities. If you just want your type and enjoy reading about it, the free test does that well. If you are weighing a change of role, a tool made for that decision is worth the extra step.

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MBTI and Myers-Briggs are trademarks of Myers & Briggs Foundation, Inc. Pigment is not affiliated with them.