期刊
SCHIZOPHRENIA RESEARCH
卷 127, 期 1-3, 页码 115-122出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.schres.2010.08.009
关键词
Learning; Inference; Decision making
类别
资金
- National Institute of Mental Health, National Institutes of Health
- Wellcome Trust
- Medical Research Council
- Glaxo Smith Kline
- MRC [G0901868] Funding Source: UKRI
- Medical Research Council [G0901868] Funding Source: researchfish
Patients with schizophrenia make decisions on the basis of less evidence when required to collect information to make an inference, a behavior often called jumping to conclusions. The underlying basis for this behavior remains controversial. We examined the cognitive processes underpinning this finding by testing subjects on the beads task, which has been used previously to elicit jumping to conclusions behavior, and a stochastic sequence learning task, with a similar decision theoretic structure. During the sequence learning task, subjects had to learn a sequence of button presses, while receiving a noisy feedback on their choices. We fit a Bayesian decision making model to the sequence task and compared model parameters to the choice behavior in the beads task in both patients and healthy subjects. We found that patients did show a jumping to conclusions style; and those who picked early in the beads task tended to learn less from positive feedback in the sequence task. This favours the likelihood of patients selecting early because they have a low threshold for making decisions, and that they make choices on the basis of relatively little evidence. Published by Elsevier B.V.
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