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Schizophrenia Bulletin 2000 26(4):921-931;
© 2000 by Oxford University Press and the Maryland Psychiatric Research Center (MPRC)
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© Oxford University Press

Characteristic Subjective Experiences of Schizophrenia

Reinhard Mass, Ph.D., Psychologist and Clinical Research Assistant
Psychiatric Clinic of the University Hospital of Eppendorf (UKE) Hamburg, Germany

Send reprint requests to Dr. R. Mass, University Hospital Eppendorf, Psychiatric Clinic, Martinistrasse 52, D-20246 Hamburg, Germany; e-mail: mass{at}uke.uni-hamburg.de

The purpose of the study was to identify subjective experiences that are characteristic of schizophrenia. A questionnaire for self-assessment of disturbances in several cognitive-perceptual areas (the Eppendorf Schizophrenia Inventory) was constructed and administered to first episode schizophrenia patients (SCHf, n=45), negative-syndrome schizophrenia patients (SCHn; n=45), remitted schizophrenia subjects (SCHr; n=24), depressive patients (DEP; n=43), alcoholic patients (ALC; n=48), obsessive-compulsive patients (OCD; n=46), and healthy controls (CON; n=57). Comparisons between the SCHf, SCHn, DEP, ALC, and OCD groups and a subsequent factor analysis revealed four schizophrenia-specific dimensions: Attention and Speech Impairment (AS), Ideas of Reference (IR), Auditory Uncertainty (AU), and Deviant Perception (DP). Further analyses suggested that the AS syndrome represents a mediating vulnerability factor, while IR, AU, and DP probably are reversible episode indicators. The results may contribute to the refinement of the measurement of specific prepsychotic signs, thus facilitating the development of early intervention approaches.

Keywords: Schizophrenia / subjective experience / diagnostic specificity / self-assessment / early signs and symptoms / Eppendorf Schizophrenia Inventory


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