Sorry to interrupt, but could someone please steer me to some info on this: (I'm new to this and don't understand what is meant by 'P and J functions are extroverted or introverted)? Thanks!
At the core of MBTI
theory, we all have 8 functions that make up (maybe not exclusively) our mind/cognition.
The two rational functions are T and F, and each have an inward (introverted) and outward (extroverted) direction to them. For example, Ti refers to the logical ordering of internal concepts (extremely rough paraphrasing!) and Te refers to the logical ordering of external concepts (ie: leadership, etc).
The two irrational functions are N and S and they also have an intorverted and extroverted version.
Rational functions are 'process' functions, or decision making functions. They aren't "rational" in the way we think of it - the definition is very specific. Irrational functions are about how we gather information to process. For example, Ne is geared towards seeing the big picture - pulling in tons of associated (and often unassociated) information. As an analogy, the forest when looking at a tree. Se, however, only pulls in the immediate information... a tree when looking at the forest. It can omit relevant ideas.
The big question is - what functions do you use? MBTI created a framework to determine which functions they use. The logic works like this;
1) Determine which rational and irrational functions you prefer (S or N, T or F).
2) Determine if you prefer an introverted or extraverted rational/irrational function (this is measured in P/J). If you prefer P, you prefer Introverted rational and extroverted irrational
3) Determine if your dominant function (rational or irrational) is introverted or extroverted (measured with E/I).
So, for example;
ISTP -> S + T functions preferred, P = Ti (introverted rational) + Se (extroverted irrational), I = Ti-Se (introverted function as dominant).
ENFJ -> N + F, J = Fe + Si, E = Fe-Si