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Understanding the Association Between Negative Symptoms and Performance on Effort-Based Decision-Making Tasks: The
L Felice Reddy1,2, William P Horan1,2, Deanna M Barch3
1Department of Veterans Affairs VISN 22 Mental Illness Research, Education, and Clinical Center, Los Angeles, CA.
This study confirms that individuals with schizophrenia exhibit deficits in effort-based decision-making. It also reveals that defeatist beliefs significantly influence the link between negative symptoms and effort, clarifying previous research inconsistencies.
Area of Science:
- Cognitive Neuroscience
- Psychiatry
- Behavioral Economics
Background:
- Motivation deficits are key in schizophrenia, often studied via effort-based decision-making.
- Previous research shows inconsistent links between negative symptoms and effort-based decision-making.
Purpose of the Study:
- Replicate findings of impaired effort-based decision-making in schizophrenia.
- Examine how defeatist beliefs moderate the association between negative symptoms and effort.
Main Methods:
- Utilized a cognitive effort task to assess decision-making in individuals with schizophrenia.
- Combined data from current and prior studies for a larger sample analysis.
- Included defeatist beliefs as a potential moderating factor.
Main Results:
- Replicated previous findings: schizophrenia is associated with impaired cognitive effort-based decision-making.
- Defeatist beliefs significantly moderated the relationship between negative symptoms and effort.
- A strong association between high negative symptoms and effort deficits was observed only in those with high defeatist beliefs.
Conclusions:
- Impaired effort-based decision-making is a consistent finding in schizophrenia.
- Defeatist beliefs play a crucial role in understanding the link between negative symptoms and effort.
- Findings may resolve discrepancies in prior research on motivation deficits in schizophrenia.
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