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Alcohol, cognitive impairment and expectancies
M T Fillmore1, J L Carscadden, M Vogel-Sprott
1Department of Psychology, University of Waterloo, Ontario, Canada.
Journal of Studies on Alcohol
|March 21, 1998
Summary
Alcohol's cognitive effects depend on expectations. Individuals expecting greater impairment performed worse, demonstrating the significant role of psychological factors in alcohol's impact on cognitive performance.
Area of Science:
- Psychology
- Neuroscience
- Pharmacology
Background:
- Individual differences in response to alcohol are significant.
- Expectations regarding alcohol's effects can influence subjective and behavioral outcomes.
- Understanding these factors is crucial for comprehending alcohol's impact on cognitive function.
Purpose of the Study:
- To investigate whether expectations about alcohol's impairing effects predict cognitive performance under alcohol and placebo conditions.
- To examine the relationship between expectancy strength and cognitive task performance.
Main Methods:
- Twenty-seven male social drinkers were assigned to alcohol, placebo, or no-treatment groups.
- Cognitive performance was assessed using a Rapid Information Processing Task.
- Participants rated their expected impairment before performing the task under their assigned condition.
Main Results:
- Alcohol significantly impaired information processing speed compared to placebo and no treatment.
- Higher expected impairment correlated with poorer performance under alcohol.
- This expectancy-performance link was observed under placebo when alcohol was anticipated, but not in the no-beverage control group.
Conclusions:
- Expectations play a critical role in modulating cognitive performance under alcohol.
- Individual differences in perceived alcohol impairment contribute to variability in responses.
- These findings highlight the importance of psychological factors in alcohol's effects on cognition.