It's just a bit of speculation on my own part, but might the fourth function of the INTj, the function that 'percieves information artificiallly at best', be one of the factors that are related to their often warped thought patterns? The correlation between the INTj and the schizo-typal disorder seems to point in this hypotheses favor, despite the anecodtal foundation of the evidence?

I doubt there is any strong basis for this hypotheses, although I do believe it to be an interesting thought; if it's not correct, at least it is something for one to ponder.