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Impulsivity, working memory, and impaired control over alcohol: A latent variable analysis.

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Impaired control over alcohol is linked to response impulsivity, a key factor in alcohol problems for young adults. Reflection impulsivity, however, is more associated with heavy drinking frequency.

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Area of Science:

  • Psychology
  • Neuroscience
  • Public Health

Background:

  • Impaired control over alcohol is a significant risk factor for heavy drinking in young adults.
  • Trait impulsivity is linked to impaired alcohol control, but specific facets require further investigation.
  • Understanding these relationships can inform interventions for alcohol problems.

Purpose of the Study:

  • To investigate the pathways from higher-order impulsivity factors to alcohol problems, mediated by impaired alcohol control.
  • To examine the moderating effect of working memory on these associations.
  • To clarify the roles of different impulsivity facets in the development of alcohol problems.

Main Methods:

  • Young heavy drinkers (N=300) completed multidimensional impulsivity measures, self-report alcohol use, alcohol problems, and impaired control assessments.
  • Working memory was assessed using a computerized digit span task.
  • Statistical analyses examined mediation and moderation effects.

Main Results:

  • Impulsivity facets formed two factors: Response Impulsivity and Reflection Impulsivity.
  • Response impulsivity predicted impaired control and alcohol problems.
  • Reflection impulsivity predicted heavy drinking frequency; impaired control mediated the link between response impulsivity and alcohol problems.

Conclusions:

  • Impaired alcohol control plays a specific role in the pathway from response impulsivity to alcohol problems.
  • Reflection impulsivity's association with alcohol problems is primarily mediated by heavy drinking frequency.
  • Working memory did not moderate the studied associations, suggesting other factors may be more influential.