It's not like myers-briggs is administered under anything resembling controlled conditions. It really is useless except for self-identifying that you like the myers-briggs categorization scheme and which of the 16 boxes you think that you are in.
Also, if you're going to cite scientific studies to rebut someone else's point, it goes much further to making your case when you actually dig up references or links to them.
Neuroanatomical Correlates of Extraversion and Neuroticism
Christopher I. Wright, Danielle Williams1 et al, Oxford JournalsLife Sciences & Medicine Cerebral Cortex (2006)
http://cercor.oxfordjournals.org/content/16/12/1809.full
It's a beachhead. It does not increase the perceived validity or precision of the test, but it does help support the claim that the theory and model, may have a basis in reality.
That is the foundation of science, models and theories describing reality.
There are also plenty of new theories being created today that have yet to be empirically evidenced. But that in itself, does not make that theory unscientific.
Thus, "What is science?" This is actually an extremely thorny question and perhaps better suited for another time. Although I should add philosophy of science and epistemology happen to be two passions of mine.
Falsificationism is a pretty good start if you are interested. It is by no means not contentious (as is probably any position in contemporary philosophy - but that is another matter)
Many engineering types with a brief flirtation with the philosophy of science, tend to like Popper's idea of a theory being solid, if in theory it is able to be shown to be false.
That is the major reason why the MBTI is not at all like horoscopes. Horoscopic predictions cannot be shown to be false (because they are too vague), but the MBTI test can be.
For example, I have never ever met a single person that has said or thinks that "all 16 types fit a person equally".
> It really is useless except for self-identifying that you like the myers-briggs categorization scheme and which of the 16 boxes you think that you are in.
That's about the gist of the MBTI reference when I included it in the page.
Also, if you're going to cite scientific studies to rebut someone else's point, it goes much further to making your case when you actually dig up references or links to them.