Mehrfachwahl-Wortschatz-Intelligenztest MWT bei Schizophrenie: Valides Maß der prämorbiden Intelligenz?^[1]

Zusammenfassung

Einleitung: Die Studie untersuchte die Validität des Mehrfachwahl-Wortschatz-Intelligenztests (MWT) als Maß des prämorbiden IQ bei Schizophrenie.

Methode: 81 post-akute Patienten mit Schizophrenie und 27 gesunde Kontrollen wurden zu zwei Zeitpunkten mit dem MWT untersucht. Bei Baseline wurden ferner eine neuropsychologische Testbatterie sowie die Psychopathologie erhoben.

Ergebnisse: Der MWT-IQ der Patienten erwies sich durch Neuropsychologie und Psychopathologie konfundiert. Im Remissionsverlauf verbesserte sich der MWT-IQ der Patienten.

Schlussfolgerung: Die Validität des MWT als Maß des prämorbiden IQ bei Schizophrenie steht damit infrage.

Abstract

Objective: The multiple-choice vocabulary intelligence test MWT (Mehrfachwahl-Wortschatz-Intelligenztest) as a measure of premorbid IQ is widely used in clinical practice and research in Germany. The study examined whether the MWT is actually insensitive to brain dysfunction and psychopathology in patients with schizophrenia.

Method: 81 post-acute patients with schizophrenia and 27 matched healthy controls completed the MWT at two points in time. At baseline, we further applied a neuropsychological test battery and a psychopathology rating.

Results: The multiple linear regression analysis showed that the MWT-IQ of patients is significantly confounded by neuropsychological dysfunctions and psychopathology. The repeated measurement ANOVA pointed to a significant recovery effect of the MWT-IQ during clinical remission in the patient group.

Conclusion: The results question the validity of the MWT as a measure of premorbid IQ in schizophrenia.

Schlüsselwörter

Schizophrenie - prämorbide Intelligenz - Wortschatztests - Validität

Keywords

schizophrenia - premorbid intelligence - vocabulary tests - validity

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