Kulhara P, Kota S K, Joseph S
Acta Psychiatr Scand. 1986 Oct;74(4):353-9. doi: 10.1111/j.1600-0447.1986.tb06254.x.
Ninety-eight schizophrenic patients were studied to examine the concept of positive and negative subtyping. Using a cross-sectional phenomenological approach, the relationship of this subtyping with six definitions of schizophrenia was also investigated. The study provides support for this subtyping. Principal components analysis of the data and correlational structure of positive and negative symptom complexes lend further support to this notion.
