My assumption is that this is in reference to religion. Religion fits parts of the definition, but generally psychosis is much more physiological than just a belief. Psychosis can encourage religiosity but not really the other way around.
Your assumption would be correct. Really, I'm not actually trying to suggest that religion is a form of psychosis. I would think that psychoses need to be held at birth, or at least genetically predisposed. However, I just wanted to point out how scary it was that so many of the symptoms of psychosis seems to be found in the extremely religious.
However, I would not be surprised if the extremely religious were to show different brain pattern (especially while praying) than the non-religious which may suggest some certain differences. Of course, I'm no expert on the subject; I just wanted to bring it up.
>>>>>>>However, I would not be surprised if the extremely religious were to show different brain pattern (especially while praying) than the non-religious which may suggest some certain differences. Of course, I'm no expert on the subject; I just wanted to bring it up.
I believe Sam Harris plans to do research on that when he finishes his doctorate.
I'd once proposed the notion of Delusional Disorder, which is a form of Psychosis (#5 on the list). It fits, particularly with some of the really hard core RRRW types. Of course in the interests of being fair and as a former mental health worker I'll say it could easily be applied to lots of other groups with some effort.
Atheist Empire has an interesting series of articles about how "god" may be just a series of particular firings in the brain and/or stimulation of a certain portion of the brain. Imagine that--all the gods and religions in the world may just be due to the firing of neurons (with some imagination and fabrication thrown in along the way).
I have a family member who works with the mentally ill, and my wife was bipolar. I can say with confidence that there is a strong correlation between religious extremes (sudden fervent piety, inflated status with regard to god, the perception of being extremely "sinful," etc.) and mental illness.
It's interesting but I am not sure how well this actually fits within reality, because I've seen how could be narcisstic person are like, it's not just a a little grandiose sense of self importance here, you really think you are in the center of the world, should constantly receive special treatment etc.
This doesn't occur if you are not the actual leader in the fundamentalist sect, since you actually pay attention to others, not yourself.