Acute alcohol effects on set-shifting and its moderation by baseline individual differences: a latent variable...

Area of Science:

• Neuroscience
• Cognitive Psychology
• Human Experimental Psychology

Background:

• Alcohol consumption is known to affect cognitive functions.
• Set-shifting tasks measure cognitive flexibility, a key executive function.
• Understanding alcohol's impact on cognitive flexibility is crucial for public health and safety.

Purpose of the Study:

• To investigate the acute effects of alcohol on set-shifting task performance.
• To compare performance during ascending and descending breath alcohol concentration (BrAC) phases.
• To examine if baseline individual differences moderate alcohol's effects on cognitive flexibility.

Main Methods:

• 222 moderate-drinking adults (21-30 years) participated in a laboratory experiment.
• Participants completed set-shifting tasks at baseline and after consuming alcohol, placebo, or control beverages.
• Cognitive performance was assessed across ascending/descending and descending-only BrAC conditions.

Main Results:

• Alcohol consumption significantly reduced improvements in set-shifting performance compared to non-alcohol groups.
• Individuals with lower baseline performance experienced greater alcohol-induced impairment.
• Set-shifting performance was significantly better during the descending BrAC phase than the ascending phase in the alcohol group.

Conclusions:

• Task practice prior to alcohol consumption can moderate acute impairments in set-shifting ability.
• The greater impairment observed during the descending BrAC phase is not explained by task practice.
• Individual differences in baseline cognitive function play a significant role in alcohol's impact on cognitive flexibility.