Also look into schizotypal personality disorder. Its a variation on schizophrenia that doesn't display positive symptoms (i.e., they don't hallucinate and all that good stuff), but they have the same severe defects in everyday life (their speech is off, they're antisocial, somewhat paranoid, isolated, etc). Way too much emphasis gets placed on the positive symptoms, because they're (sort of) required for a diagnosis, but the negative symptoms are there as well.

--------------------------------------------------
Note added at 10 hrs (2011-03-04 09:58:55 GMT)
--------------------------------------------------

JAKIE SĄ OBJAWY SCHIZOFRENII?
Typowymi objawami są:
objawy pozytywne (wytwórcze) ▶
objawy negatywne (deficytowe) ▶
zaburzenia procesów poznawczych ▶

http://drogadosiebie.pl/?page=schizofrenia-objawy&an=3l

-------------------

The symptoms of schizophrenia are generally divided into three categories -- Positive, Negative, and Cognitive:

Positive Symptoms, or "psychotic" symptoms, include delusions and hallucinations because the patient has lost touch with reality in certain important ways

http://www.nami.org/Template.cfm?Section=By_Illness&Template...