The spanish tests are INTJ. I can see a pattern here...
They [ISTJs] place great importance on honesty and integrity. They are "good citizens" who can be depended on to do the right thing for their families and communities.
ISTJs tend to believe in laws and traditions, and expect the same from others.
Both are not necessary compatible, sometimes do the rigth thing doesn´t imply respect laws and traditions.
(like when GrampaGeek choosed a woman with brains, or, if you like an example from literature, when Antigone
barried her brother http://en.wikipedia.org/wiki/Antigone_%28Sophocles%29