Decision-making under risk and its correlates in schizophrenia

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychiatry

Background:

• Schizophrenia spectrum disorders (SSD) are characterized by cognitive deficits, particularly in decision-making under risk.
• Existing research on the specific mechanisms of altered decision-making in SSD is inconclusive.

Purpose of the Study:

• To investigate risk preference and adjustment in dynamic decision-making among individuals with SSD.
• To explore the relationship between decision-making patterns, clinical symptoms, and functioning in SSD.

Main Methods:

• Utilized the Columbia Card Task, a validated measure of risk-taking behavior.
• Compared decision-making patterns in 33 individuals with SSD and 28 non-SSD controls.
• Assessed associations with disorganized symptoms, excited symptoms, role functioning, and working memory.

Main Results:

• No significant group differences were observed in overall risk-taking, risk preference, or optimal decision-making.
• Individuals with SSD demonstrated blunted risk adjustment to contextual changes, such as varying loss probabilities.
• Risk-taking and suboptimal decision-making correlated with disorganized and excited symptoms, and impaired role functioning, but not working memory.

Conclusions:

• Individuals with SSD exhibit reduced adaptability in dynamic risk-taking tasks, indicating a potential deficit in risk perception.
• Cognitive alterations in SSD impact the ability to adjust decisions based on evolving risk information.
• Findings highlight the need for interventions targeting decision-making and risk processing in schizophrenia spectrum disorders.