Abstract
A study on the concept and measurement of the basic disorders of schizophrenia is presented. A total of 151 male adult psychiatric inpatients (51 with a dual diagnosis of schizophrenia and alcoholism, 50 schizophrenics and 50 alcoholics) were included. The aims of this study were: (1) the replication of the previous finding that the Frankfurt Complaint Questionnaire (FBF) contains items that discriminate between schizophrenia and alcoholism; (2) an empirical comparison between FBF and the Bonn Scale for the Assessment of Basic Symptoms (BSABS); (3) testing the relationship between basic and negative versus positive symptoms, as measured by the Positive and Negative Syndrome Scale (PANSS). Regarding (1), the former result was replicated. Regarding (2), FBF subscales and BSABS categories were shown to be significantly but weakly related, even if identical symptoms were included in the inquiry. Regarding (3), FBF and BSABS were found to be more closely related to negative than to positive PANSS items. Theoretical implications and consequences for further research are discussed.
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