II. Impairments in Schizophrenics in Cross-sectional and Longitudinal Perspective — The Mannheim Experience in Two Independent Samples

Abstract

Trimble (1986) has pointed out a shortcoming of the current wave of literature on negative symptoms: there is no overall consensus within psychiatry as to which symptoms and signs are to be considered positive and which negative (Kayton, 1973; Carpenter et al , 1976; Sheldrich et al , 1977; WHO, 1979; Andreasen, 1979; Jablensky, 1981; Crow, 1982, this volume; Rosen et al , 1984; Zubin, 1985; Kulhara et al , 1986).