Dual-type theory - Wikisocion
Visual Identification of Subtypes - Wikisocion
First I'd like to explain what a dual-type is if we look at Jungian dichotomies...
What is an INTj-INFp? The following graph will show it:
Very introverted, very intuitive, more thinking than feeling, more judging than perceiving. Another example: Which type is it?
That is an ESTp-ISTj.
Just for the record, I do not recommend to use MBTI tests or something like that to determine your dual-type. Those tests are not even reliable if you want to find your first type. Nevertheless, theoretically it would work like that if test results were 100% accurate...
Now what does this dichotomous approach have to do with a physiognomical proof of dual-type theory? Quite a lot I think because, interestingly, the shape of your face is not only determined by your first type and not only by your second type - it is determined by a combination of both types!
Why does an INTj-INFp have an oval face? Because the base function (Ni) of the second type is the demonstrative function of the first type.
Why does an ESTp-ISTj have a square face? Because the base function (Ti) of the second type is the creative function of the first type.
Ni is INTj's demonstrative function which is a vital, bold, strong function. According to the pattern I discovered, strenghthened vital functions cause a longish face, bold implies soft and strong implies mathematical. That's why the face of an INTj-INFp is an oval...
Can this correlation be explained by Jungian dichotomies alone? Does a person who is VERY introverted always have a longish face or something? No, that's not the case. An INTj-INFj, for example, has a roundish face because INFj's base function, Fi, is INTj's role function which is mental. Or does a person who is VERY introverted and RELATIVELY judging always have a longish face then? Yes, indeed. INTj-INFp, INTj-INTp, INTj-ISTp and INTj-ISFp all have longish faces because the base function of the second type, Ni or Si, is a vital function of the first type.
It obviously makes much more sense to remember that, for example, "a strengthened vital function causes a longish face" than to say: "People who
are very introverted and relatively judging (Ixxj-Ixxp)
OR very introverted and relatively perceiving (Ixxp-Ixxj)
OR relatively introverted and very judging (Ixxj-Exxj)
OR relatively introverted and very perceiving (Ixxp-Exxp)
OR very extraverted and relatively judging (Exxj-Exxp)
OR very extraverted and relatively perceiving (Exxp-Exxj)
OR relatively extraverted and very judging (Exxj-Ixxj)
OR relatively extraverted and very perceiving (Exxp-Ixxp)
have a longish face".
That's why we should talk about dual-types and functions and all the stuff...
Unfortunately, Tcaudillg is unable to confirm this pattern, even though it somehow is the physiognomical proof of the existence of two types in one person.