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- W2057024097 abstract "Recent models assume that some symptoms of schizophrenia originate from defective reward processing mechanisms. Understanding the precise nature of reward-based learning impairments might thus make an important contribution to the understanding of schizophrenia and the development of treatment strategies. The present study investigated several features of probabilistic reward-based stimulus association learning, namely the acquisition of initial contingencies, reversal learning, generalization abilities, and the effects of reward magnitude. Compared to healthy controls, individuals with schizophrenia exhibited attenuated overall performance during acquisition, whereas learning rates across blocks were similar to the rates of controls. On the group level, persons with schizophrenia were, however, unable to learn the reversal of the initial reward contingencies. Exploratory analysis of only the subgroup of individuals with schizophrenia who showed significant learning during acquisition yielded deficits in reversal learning with low reward magnitudes only. There was further evidence of a mild generalization impairment of the persons with schizophrenia in an acquired equivalence task. In summary, although there was evidence of intact basic processing of reward magnitudes, individuals with schizophrenia were impaired at using this feedback for the adaptive guidance of behavior." @default.
- W2057024097 created "2016-06-24" @default.
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- W2057024097 creator A5027556916 @default.
- W2057024097 creator A5071161801 @default.
- W2057024097 creator A5084941751 @default.
- W2057024097 date "2009-01-01" @default.
- W2057024097 modified "2023-10-03" @default.
- W2057024097 title "Impairment of probabilistic reward-based learning in schizophrenia." @default.
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- W2057024097 doi "https://doi.org/10.1037/a0016166" @default.
- W2057024097 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19702411" @default.
- W2057024097 hasPublicationYear "2009" @default.
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