Empirical studies of the relation between premorbid social competence and paranoid-nonparanoid status in schizophrenia were reviewed. The inconsistent findings in this area of research were noted, and positive versus negative findings were discussed in terms of methodological differences and difficulties, particularly the problem of heterogeneity in the diagnostic categories investigated. The explanation was advanced that good premorbid competence and the symptoms leading to a diagnosis of paranoid schizophrenia are both reflections of a higher developmental maturity level. Theoretical considerations concerning the paranoid-nonparanoid distinction in schizophrenia, the premorbid social competence construct, and the importance of the relation between these two concepts were presented.
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