Impulsivity in Gambling Disorder and problem gambling: a meta-analysis

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Psychology

Background:

• Gambling Disorder is linked to cognitive dysfunction affecting impulsive behavior.
• Previous research has not comprehensively meta-analyzed all impulsive cognitive domains in Gambling Disorder.
• It remains unclear if cognitive deficits extend to problem (at-risk) gamblers.

Purpose of the Study:

• To conduct a meta-analysis of cognitive domains related to impulsivity in Gambling Disorder.
• To investigate whether cognitive deficits are present in at-risk gamblers.
• To explore potential moderators of cognitive performance in Gambling Disorder.

Main Methods:

• Systematic review of case-control studies on cognitive domains (attentional inhibition, motor inhibition, discounting, decision-making, reflection impulsivity).
• Meta-analysis using random-effects modeling to identify case-control differences.
• Moderation analysis to assess influences of age, gender, comorbidities, region, and study quality.

Main Results:

• Gambling Disorder showed significant impairments in motor inhibition (g=0.39-0.48), attentional inhibition (g=0.55), discounting (g=0.66), and decision-making (g=0.63).
• Problem gambling exhibited significant decision-making impairment (g=0.66), though study quality was low.
• Publication bias was noted in the discounting domain; most studies lacked screening for comorbid disorders.

Conclusions:

• Heightened impulsivity across various cognitive domains is characteristic of Gambling Disorder.
• Decision-making impulsivity may be a cognitive vulnerability marker for problem gambling, requiring further research.
• Future studies should confirm these findings and address methodological limitations, including comorbid disorder screening.