Original post by hockham jaynsawI could write 3, maybe 4 essays here explaining different parts, but I'll try to give an incredibly brief review in the hope that I don't lose you in the process but you can still see what's going on.
When you take a MBTI test, you get assigned a 4 letter acronym which corresponds to a personality type. Most tests will tell you that, if you're an INTJ, you're a person who likes to keep to himself rather than socialize, is creative/imaginative, prefers rationality over ethics, and orderliness over spontaneity. The problem is, this is just scratching the surface and makes behavioral based assumptions, deviating away from what typology is really about. This is because Typology was started by a psychologist called Carl Jung, and was written in a style meant for other psychologists to read, but years later a mother and daughter, Myers-Briggs, took Jung's work, and made it accessible to the public by simplifying the work and making an easy test to find out your type.
When you look deeper into typology, you'll find that we describe 8 functions that describe your thought process and information metabolism: Broadly, they can be split into Judging and Perceiving: The Perceiving functions, Intuition and Sensing, are how we perceive or observe the world. Your Judging functions, Thinking and Feeling, are how we assimilate data in a coherent order -- it's how we reason with the data observed through the Perceiving functions.
Each function has an 'attitude', introverted and extroverted. Simply put, extroversion is an objective attitude, where your function perceives or judges the object (the thing you're processing) removed from the subject (you), introversion is a subjective attitude, where your function will perceive or judge in a way specific to you, forming a unique impression based on other data you've taken in before.
With thinking, feeling, sensing and intuition, and the attitudes introversion and extroversion, we have 8 functions that can be used in different combinations to most accurately describe your thought process:
The Judging Functions: Extroverted Thinking (Te), Introverted Thinking (Ti), Extroverted Feeling (Fe), Introverted Feeling (Fi), and;
The Perceiving Functions: Extroverted Sensing (Se), Introverted Sensing (Si), Extroverted Intuition (Ne), Introverted Intuition (Ni).
Now, when I look at INTJ, I don't see Introverted, Intuitive, Thinking, Judger anymore, because what it's actually describing is my functional makeup (Ni, Te, Fi, Se)*
The functions are far more useful at describing personalities than the dichotomies used in the MBTI tests, and are far more accurate because they don't stereotype in an useless way like Myers Briggs does. The introverted attitude has nothing to do with sociability, it just means that that person's primary mode of working with an object is to do so in their inner world, assimilating the object into himself. It's true that somebody with a primary introverted function, like introverted intuition for an INTJ, is more likely to not be sociable, because they are more comfortable as observers, but an INFJ, for instance, also has an introverted primary function and they are usually quite extroverted (because their functional makeup is Ni Fe Ti Se, and the Ni-Fe likes people systems, while my Ni-Te likes systems).
*To understand how you get from the 4 letter type to the 4 different functions, you follow quite a simple set of rules:
In the case of INTJ again, we learn from the letters that my main two functions are intuition and thinking (the letters in the middle), and that the judging function is the extroverted one (because the last letter is 'J' for judging), and lastly that my introverted function (which we then deduce will be intuition since my thinking is extroverted -- they are always opposite) is my primary function.
So the order is Ni, Te. Then you ask, well what about the other functions? Basically, the system takes two perceiving functions and two judging functions with opposite attitudes (one extroverted and one extroverted, or rational and irrational, or objective and subjective), and polarizes them -- meaning if Introverted Intuition is my strongest function, Extroverted Sensing is my weakest (you see that you're both judging functions?). Then we do the same with my Te. The opposing function is Introverted Feeling, and since Te is my second strongest, Fi is my second weakest. Thus, Ni, Te, Fi, Se.
Another example: The ESTP:
Sensing and Thinking
Perceiving function is extroverted, so Se
Means judging function is introverted, so Ti
Extroverted function is strongest so order is Se, Ti
Opposite of Se is Ni, so Se, Ti, ___ , Ni
Ti's opposing function is Fe, so Se, Ti, Fe, Ni
ENTJ:
Te, Ni, Se, Fi
ISFJ:
Si, Fe, Ti, Ne, etc.
I hope that was at least partially comprehensive.