(One of the criticisms of this test is that religious people often test as psychotic: "Do you sometimes think someone else is directing your actions? Is someone else trying to plan events in your life?" Is that a bug, or a feature?)

One of my neuroscience teachers made us read studies showing that very religious people have near-schizophrenic dopamine levels. He also pointed out that schizophrenics have delusions of grandeur/feelings of persecution that are reminiscent of certain religious beliefs.

Then again, he also made us read "The God Delusion", so he may just cherry-picked the studies because he had an ideological axe to grind.