So basically, the more you worry about the outside world and gain information, the more extroverted you are, when the more you analyze information aationlready taken in, the more introverted you are?
Heres an explanation from jung lexicon to what E function does:
Empathy
An introjection of the object, based on the unconscious projection of subjective contents.
"Empathy presupposes a subjective attitude of confidence, or trustfulness towards the object. It is a readiness to meet the object halfway, a subjective assimilation that brings about a good understanding between subject and object, or at least simulates it. ["The Type Problem in Aesthetics," CW 6, par. 489.]"
In contrast to abstraction, associated with introversion, empathy corresponds to the attitude of extraversion.
"The man with the empathetic attitude finds himself . . . in a world that needs his subjective feeling to give it life and soul. He animates it with himself. [ Ibid., par. 492.] "
And introversion:
Abstraction
A form of mental activity by which a conscious content is freed from its association with irrelevant elements, similar to the process of differentiation.
"Abstraction is an activity pertaining to the psychological functions in general. There is an abstract thinking, just as there is abstract feeling, sensation, and intuition. Abstract thinking singles out the rational, logical qualities of a given content from its intellectually irrelevant components. Abstract feeling does the same with a content characterized by its feeling-values . . . . Abstract sensation would be aesthetic as opposed to sensuous sensation, and abstract intuition would be symbolic as opposed to fantastic intuition.["Definitions," CW 6, par. 678.]"
Jung related abstraction to introversion (analogous to empathy and extraversion).
"I visualize the process of abstraction as a withdrawal of libido from the object, as a backflow of value from the object into a subjective, abstract content. For me, therefore, abstraction amounts to an energic devaluation of the object. In other words, abstraction is an introverting movement of libido.[Ibid., par. 679.]"
To the extent that its purpose is to break the object’s hold on the subject, abstraction is an attempt to rise above the primitive state of participation mystique.
http://www.nyaap.org/jung-lexicon
But E and I isnt just about this, this is how you create inner and outer object, sort of subjective understanding of something that you perceive. Its like creating two inner and outer objects(from the two introvertes functions and two extraverted functions, with INTP ofc Ti Si and Ne Fe) of same thing and combination of these the inner + outer objects is what you come conscious of.
But there is a little twist to this. When you create an object with differentiated(or developed) functions, you do it consciously. but when you use an undifferentiated function to create an object, you do it unconsciously. Also with two(or more) differentiated(conscious) functions, you are able to consciously check if the objects match, and leave one of these objects away(or put more weight over one) from the situation, if you think it needs to be done.
But having all four functions differentiated is no easy process, so thats usually not the case. so one to tree of these objects merges unconsciously to the final object.
You could also think this as looking at one thing from four different perspectives(T N S F), but only coming conscious of the combination(but with knowledge of functions, you might be able to separate these parts). for example if i look at my cat, im seeing that it is(S), analyzing it(T), i know that its worth alot to me(F) and if i see her meowing when i go to kitchen, i know her meowing like this certain way and in this certain situation came from her wanting food or if i see her at kitchen looking at me in living room in certain way, i know that if i go to kitchen, she will start meowing for food(N).
Now i dont see these things at separate parts when i go to kitchen and hear her meowing, instead i see these as one, my cat wanting food.
But there comes situations where its best to consciously see all 4 sides of the one thing, so that you can choose which to rely on this situation, so that i can concentrate on whats important in the situation and which to leave out, so that some of these perspectives(that dont fit to situation) wont dim my vision and so that im not projecting some unrelated associations to it.
But i think what really matters to fully understand this is to be able to see functioms as principles of inserting info to external world and to take out of it. because these principles are what create the perspectives.
Cba to write more now, hope you get something out of this. if it feels confusing i suggest reading this whole thing twice and then reading the op again. do ask if you are still confused.
Oh yea, its also about how much you relate to this internal or external object. extraverted types relate to external object more, because they are more conscious of it AND because they created it, their whole world is around this external object more, because they are more conscious of it. this is also why they might need more external validation, because they arent as aware of the internal objects. someone telling how good they look today, the words are the object to which they relate to.