Reduced willingness to expend effort for rewards is associated with risk for conversion and negative symptom severity in youth at clinical high-risk for psychosis
| Autor: | Gregory P. Strauss, Lauren Luther, Lisa A. Bartolomeo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
High probability
Negative symptom Psychosis education.field_of_study business.industry Prodromal Syndromes Population medicine.disease 030227 psychiatry Prodrome Reward processing 03 medical and health sciences Psychiatry and Mental health 0302 clinical medicine Schizophrenia medicine education business 030217 neurology & neurosurgery Applied Psychology Clinical psychology |
| Zdroj: | Psychological Medicine. 53:714-721 |
| ISSN: | 1469-8978 0033-2917 |
| DOI: | 10.1017/s003329172100204x |
| Popis: | BackgroundSchizophrenia (SZ) is typically preceded by a prodromal (i.e. pre-illness) period characterized by attenuated positive symptoms and declining functional outcome. Negative symptoms are prominent among individuals at clinical high-risk (CHR) for psychosis (i.e. those with prodromal syndromes) and predictive of conversion to illness. Mechanisms underlying negative symptoms are unclear in the CHR population.MethodsThe current study evaluated whether CHR participants demonstrated deficits in the willingness to expend effort for rewards and whether these impairments are associated with negative symptoms and greater risk for conversion. Participants included 44 CHR participants and 32 healthy controls (CN) who completed the Effort Expenditure for Reward Task (EEfRT).ResultsCompared to CN, CHR participants displayed reduced likelihood of exerting high effort for high probability and magnitude rewards. Among CHR participants, reduced effort expenditure was associated with greater negative symptom severity and greater probability of conversion to a psychotic disorder on a cross-sectional risk calculator.ConclusionsFindings suggest that effort-cost computation is a marker of illness liability and a transphasic mechanism underlying negative symptoms in the SZ spectrum. |
| Databáze: | OpenAIRE |
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