Acute effect of alcohol on working memory updating

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Behavior

Background:

• Working memory (WM) updating is crucial for cognitive flexibility.
• The effects of alcohol on WM updating, particularly across different blood alcohol concentration (BAC) phases, require further investigation.

Purpose of the Study:

• To investigate the acute effects of alcohol on working memory updating.
• To determine if these effects vary between the ascending limb (AL) and descending limb (DL) of the BAC time-course.

Main Methods:

• A two-session experiment with 231 young adults randomly assigned to alcohol, active placebo, or control beverage conditions.
• Working memory updating was assessed using three tasks (letter memory, keep track, spatial 2-back) at three time-points.
• Latent working memory updating performance was analyzed using multi-group modeling.

Main Results:

• Performance on working memory updating tasks improved in placebo and control groups during both AL and DL phases.
• Alcohol consumption did not significantly impair working memory updating at either AL or DL.
• Alcohol consumption attenuated the practice-related improvements in working memory updating.

Conclusions:

• Acute alcohol consumption may not directly impair working memory updating.
• Alcohol's dampening effect on performance improvements could impede the ability to complete novel or unpracticed tasks.