Verbal memory dysfunction in substance use and gambling addictive disorders: a comparative analysis of performance...

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Psychology

Background:

• Addiction involves cognitive deficits beyond reward pathways.
• Memory impairments are noted in substance use and behavioral addictions, but findings are inconsistent.
• Specific verbal memory deficits and error types require further investigation for diagnostic relevance.

Purpose of the Study:

• To investigate verbal memory performance and error patterns in individuals with various addiction disorders.
• To compare cognitive profiles across stimulant use disorder, alcohol use disorder, cannabis use disorder, and gambling disorder.
• To assess the diagnostic utility of detailed error analysis in addiction.

Main Methods:

• A neurocognitive screening battery was administered to 515 participants, including patients with addiction disorders and healthy controls.
• Immediate and delayed verbal memory performance was assessed.
• Specific error metrics (e.g., intrusions, repetitions) were analyzed alongside global performance.

Main Results:

• Stimulant, alcohol, and gambling use disorders showed significantly lower correct recall than controls.
• Alcohol use disorder was linked to increased intrusion errors, indicating executive function deficits.
• Stimulant use disorder was associated with more repetition errors, suggesting impaired memory monitoring.

Conclusions:

• Combining global memory measures with error analysis provides a more nuanced understanding of cognitive deficits in addiction.
• Distinct error patterns may serve as disorder-specific cognitive signatures for improved diagnostics.
• Advanced neurocognitive tools are valuable for neuropsychological assessment in addiction psychiatry.