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Incorrigibility, jumping to conclusions, and decision threshold in schizophrenia
Ruth Veckenstedt1, Sarah Randjbar, Francesca Vitzthum
1Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany. r.veckenstedt@uke.uni-hamburg.de
Cognitive Neuropsychiatry
|January 29, 2011
Summary
Patients with schizophrenia exhibit a bias against disconfirmatory evidence (BADE), showing less flexible decision-making. This cognitive pattern may contribute to delusional incorrigibility in schizophrenia.
Area of Science:
- Cognitive psychology
- Psychiatry
- Neuroscience
Background:
- Previous research identified a bias against disconfirmatory evidence (BADE) in paranoid schizophrenia.
- The current study investigates the link between BADE and delusional ideation.
Purpose of the Study:
- To explore the relationship between the bias against disconfirmatory evidence (BADE) and delusional ideation in schizophrenia.
- To compare decision-making processes in schizophrenia patients with control groups.
Main Methods:
- Fifty-five schizophrenia patients (32 with delusions), 20 OCD patients, and 30 healthy controls evaluated scenarios with disambiguating sentences.
- Participants rated interpretations, adjusting judgments with new information, and decided on the most plausible interpretation.
- The study assessed the bias against disconfirmatory evidence (BADE) and jumping to conclusions.
Main Results:
- Schizophrenia patients showed a significant BADE, attenuating lure interpretation ratings less than controls.
- No impairment was found in integrating confirmatory evidence.
- Schizophrenia patients made more incorrect decisions early on, indicating jumping to conclusions and a lowered decision threshold.
Conclusions:
- Patients with schizophrenia demonstrate hasty and inflexible decision-making.
- This cognitive style may be a vulnerability factor for delusional incorrigibility in schizophrenia.
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