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Functions for all Types

Hopefully this list will make your life easier when it comes to figuring out your functions. 


INFJ: Ni, Fe, Ti, Se

INTJ: Ni, Te, Fi, Se

ENTP: Ne, Ti, Fe, Si

ENFP: Ne, Fi, Te, Si


ESFJ: Fe, Si, Ne, Ti

ENFJ: Fe, Ni, Se, Ti

ISFP: Fi, Se, Ni, Te

INFP: Fi, Ne, Si, Te


ESTJ: Te, Si, Ne, Fi

ENTJ: Te, Ni, Se, Fi

ISTP: Ti, Se, Ni, Fe

INTP: Ti, Ne, Si, Fe


ISTJ: Si, Te, Fi, Ne

ESTP: Se, Ti, Fe, Ni

ISFJ: Si, Fe, Ti, Ne

ESFP: Se, Fi, Te, Ni


Going In Depth: Functions

Now that I’ve kind of reviewed some of the various functions, let’s discuss them more in detail. Understanding functions can help you greatly when it comes to understanding people and, especially, typing them. Personality types can resemble each other very greatly but, on the level of functions, their differences become quite obvious. Here is a very basic example:

My functions: Ne Ti Fe Si

Ne: sees patterns as a web

Ti: uses logical statements to see reality 

Fe: empathy, what others think

Si: uses past experience to shape present behavior 

ENFP Functions: Ne Fi Te Si

Ne: see patterns as a web

Fi: strong moral code “developed internally”

Te: organizing logic

Si: past experiences shape present behavior 


On the front, it is easy for one to say, “oh, they must be really similar.” However, they way I truly see the world differs greatly from an ENFP, even though we are only one letter away. While we are similar on the front, when you get to the internal mechanics there is a different story. Whereas I enjoy making decisions and processing through Ti an ENFP feels much more compelled to funnel information through their strong moral system (Fi). Hopefully this example sheds light on why functions are important. In the next post I will clarify each individual function. 

Update on MBTI: The Sensing Types

I had taken a hiatus from blogging about MBTI, so I’m going to pick up where I left off and pretend nothing happened. The next two categories I’d like to cover are:



These are the more common of the personality types: the Guardian and the Artisan. 

The Guardian

The SJ is frequently viewed as the “do-gooder.” They tend to like to follow the rules, trust authority, maintain tradition and convention, and do what works. Once I delve into functions it will become clearer as to why this is. Oftentimes, as SPs do, they tend to become bored with reading anything but factual accounts. Fantasy is not their cup of tea. 

The Artisan

Artisans operate strongly in the physical world. They tend to enjoy tasting and touching everything, which can lead to over-indulgence. They frequently enjoy living in the moment, which can also get them into trouble. They can be extremely direct and people tend to be charmed by their fun-loving natures. 

Four Types: Rational, Guardian, Artisan, Idealist

Before I move onto functions, I’d like to discuss the general categories in a little more detail. There are four categories of type, characterized by a two letter combination. Let’s start with those who prefer intuition.

NT: The Intuitive Thinker

Those familiar with MBTI may use these words to describe NTs:

Geeky, nerdy, callous, private, into video games, weird, abstract, lost in thought, highly intelligent, weird, logical, weird, systematic, weird, evil masterminds, hypothetical, trolls, lives in their parent’s basement, socially inept, quirky (a term that can be applied to most intuitives), technologically savvy

Now, these are stereotypes, so keep that in mind. I won’t regurgitate statistics for you, because I myself don’t believe them. I will say that maybe 3% of everyone I have ever met has been an NT. That is being generous. Many people test as NT due to a lack of understanding of MBTI. That’s okay. I’m here to help with clarifying.

NF: The Intuitive Feeler

NF stereotypes

Fighters for a cause, overly emotional, compassionate, seeking their one true love, loyal, abstract thinkers, sentimental, at times very logical, passionate, selective in love, good with words, readers, writers, artists, poets, moral, dreamers, unique, crazy, irrational, strange

I have met a fair number of NFs relative to NTs. This is just my personal experience. Those who prefer intuitive functions tend to be rarer than those who prefer the sensing functions. This probably has to do with evolution.

A bomb falls from the sky

NF- doesn’t notice, too buried in a romance novel

NT- doesn’t notice, as they are too busy thinking about how to make systems more efficient

SJ- notices, calls everyone to order

SP- identifies best course of action. Runs.

This is more for amusement than anything, but there is truth to it. Intuitives tend to be very spacey and lost in thought. And above all, weird. Next, I shall discuss the sensing types.

Thinking and Feeling

This dichotomy is another one that people frequently get confused on. Let’s look at some basic thinker/feeler differences


Information is processed through a feeling function before a thinking function. This information is either internalized and compared against a self-created system or externalized through a system that relies heavily on society and what other people believe (this is the simplest way I can put this).

Feelers rely on their feeling function when making decisions. They ask themselves how does this make me or others feel. Because of this, they are frequently seen as compassionate or warm people, as they are naturally more attuned to other people’s feelings, or at least their own. When I discuss functions, we’ll see in what instances feelers can be rather callous. On the contrary-


Information is processed through a thinking function first. Again, this information is either internalized or externalized. Internalized logic is much like internalized feeling- it is a self created system and viewed as nearly impervious to anything. On the contrary, an externalized thinking function tends to be more malleable. Those who use the externalized thinking function tend to be better at mobilizing (actually getting stuff done, at best). Those who internalize information logically tend to, at worst, be impractical, as their system is more abstract. While in some ways the internalized thinking function is very useful, it can manifest itself in the form of sitting around and thinking, rather than doing, all day (especially seen with xNTPs).


After reviewing these differences, it can be easy to see why thinkers can come off as colder than feelers.

What Feelers may say to Thinkers

You’re not compassionate


You don’t care about people

You’re too logical

Things aren’t that black and white

A Thinker to a Feeler

You need to be more logical

That is the dumbest thing I’ve ever heard anyone say

Will you calm down?

You don’t make any sense

Why are you angry at me? I didn’t know you implied you wanted a kiss!

I’m sorry I forgot your birthday for the eighth year in a row!

Thinkers can be somewhat oblivious at times (even those who use sensing functions). However, a thinker with a well-defined feeling function can be very attentive. As you learn more about functions and personality, it is important to self reflect, and see what you can work on.


Intuition and Sensing

Onward and forward to the second letter of your/your lover’s/your pet antelopes type! For those who would like to start from the beginning, go to the page on introversion and extroversion.

If you are typing someone, fear not if you cannot decide whether or not they have a preference for introversion and extroversion. People are not always so black and white, and you may see many sides of a person in a year (though hopefully the healthy sort of sides).

I personally think that the intuition/sensing dichotomy is one of the most obvious, as Intuitives and Sensors tend to experience the world very differently (even those that do not use a sensing/intuition function first). Again, MBTI is about what your preferred way to perceive is. Let’s look at a few (somewhat black and white) hypothetical situations:

First, Let’s Give a Sensor a Flower

The Sensor picks up the lilac, and immediately notices the smell, the shape, and perhaps the exact color. They may or may not be reminded of something- however, they will more than likely notices the minute details of the flower. This is because Sensors live and perceive the world through their five senses. Sensing is a function that deals more with what is than what could be, and sensing something is picking up traits of your surroundings (whether it be the environment or the variety of objects).

Let’s Give the Intuitive a Flower

The Intuitive may not even notice you gave them a flower. An example of a reaction an intuitive may have to a flower is to compare it to the softness of their child’s hair. To the smell, an Intuitive may very well be taken back in time, connecting the scent of the current to a scent in the past. Or perhaps a mad NT got a hold of the flower and is plotting it’s use in world domination. While there are certainly dichotomies within dichotomies, the overall difference can be summed up to:

Sensing perceives in the present and through the five senses, whereas intuition draws connections from what is sensed. 

Perhaps, so far, you have felt that you are a Sensor and are angrily about to smash a yam into the computer, for you too make connections. Fear not! Soon we shall discuss the variety of functions that different types use soon enough.

Let’s stick a sensor and an intuitive in a white room.

Intuitive, “why are we in this white room? It would be really cool to paint this. I wonder if there is anyone on the other side of the wall”.

Sensor (driven mad by the whiteness) begins to think of a plan of action. Wondering and thinking like that will not get them out.

General Statements about Intuitives and Sensors


Imaginative, tends to like to read and think, extrapolates, tends to enjoy subjects like philosophy and other abstract ideas, at worst impractical, can lose track of time (think of the Absent Minded Professor- most likely an xNTP), may forget things like birthdays, weddings, and even names


Perceives through fives senses, practical, down to earth, may not like to read, or may not like to even learn, tends to be coordinated and inherently more extroverted, uses descriptive language instead of abstract language, discusses real world things more often (sports, the birdhouse they are building, the party they are going to attend, etc)


Keep in mind that these are not meant to be read like the Gospel. Or even like the back of a cereal box. These statements can apply to both types, but what we are trying to do here is seek patterns in people so that we may better establish what their overall preferences are.

Introversion and Extroversion

Do you like to be alone a lot? Perhaps your friends tell you that you bottle things up. On the contrary, you are free with information, but are maybe a little slower to recognize the impact of your words. Does any of this sound familiar? If so, congratulations- you are human! Before I go on to describe the differences in introversion and extroversion, I am going to put in the first of many disclaimers: introversion and extroversion describe the perception of information. It is notabout: whether or not you like alone time, whether or not you like people, whether or not you feel popular, and whether or not you are shy. I have known extroverts that have been very shy, and introverts that have been very popular. It is important to rid yourself of preconceived notions in order to more accurately type yourself and others.

I) Energy: Extroverts, on the whole, gather energy from interacting with people. Perhaps you know someone who begins to laser down the beams of their house when they are stuck inside for too long. They begin to eat only microwaved food and they foam at the mouth. Chances are, this person is an extrovert (another disclaimer: stereotypes may intentionally or unintentionally be used in the introduction as a simple mechanism to help those new to MBTI to begin their quest to type themselves and others).

On the contrary, you may know someone who gets irritable, sleepy, or withdrawn when around others for more than a few hours, or when they perceive are with too many people at a time. This is a more apt description for our introverted friends. Introverts tend to need more alone time than extroverts, and also tend to be more private.

II) Pursuit of Interest: Introverts naturally tend to be deeper than extroverts (that isn’t to say that extroverts cannot be deep as well) and will likely pursue only one or two love interests during high school with extreme passion (most likely hidden), have only one or two job options they truly want to do, have only one or two hobbies that they pursue with fervor, etc. Extroverts, on the other hand, may have six or seven different hobbies, a large circle of friends (or those they are only lightly acquainted with), and be filled with countless ideas (this is especially true for ENxx’s).

III) Perception of Information: this topic is slightly more advanced, as it deals with the topic of how people process information. All introverts process information through an introverted function first (Ti, Ni, Si, Fi) as opposed to extroverts, who process information through extroverted functions (Te, Ne, Se, Fe). the “first” in emphasized because all of the types use introverted and extroverted functions, but in different orders. For this reason, I like to this of functions as a sort of filter for people (again, I will later go into more detail on the topic of functions (and some debates around them).

You now have two relatively simple tools (and one that requires a little more thought) that you can use in determining whether or not someone is introverted or extroverted. Later one, I will discuss the other dichotomies more in-depth.