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[Assessment of overinclusion in schizophrenia by a computer-assisted version of the Concept Overinclusion test]
Wolfram Kawohl1, Corina Winzer, Severin Stadtmann
1Forschungsgruppe Klinische und Experimentelle Psychopathologie, Klinik für Soziale Psychiatrie und Allgemeinpsychiatrie Zürich West, Psychiatrische Universitätsklinik Zürich.
Objective:
A special form of formal thought disorder is the overinclusion in schizophrenia. The Begriffsumfangstest (BUT, Concept Overinclusion test) is a neuropsychological test for the assessment of this phenomenon. The test is available in a paperand- pencil version since the 1990s and now available in a computerized version. The aim of this study was a replication of the paper-and-pencil version with the computerized version of the test and also the detection of putative correlations with ego-psychopathology.
Methods:
40 patients with schizophrenia and 16 healthy controls were assessed with the BUT and with a scale for the assessment of ego-psychopathology (IPP). The tests were performed on five different time points with intervals of approximately two weeks.
Results:
The BUT-parameters for the group of patients and the control group differed significantly. Several positive correlations were found between he values of the BUT and the IPP.
Conclusion:
The computerized Version of the BUT is also applicable for the detection of overinclusion. The relation between overinclusion as a semantic dysfunction and ego-psychopathology may lead to further psychopathological investigations concerning schizophrenic thought disorders.
