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Relation of prenatal alcohol exposure to cognitive processing speed and efficiency in childhood

Matthew J Burden1, Sandra W Jacobson, Joseph L Jacobson

  • 1Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan 48207, USA. mburden@wayne.edu

Alcoholism, Clinical and Experimental Research
|September 1, 2005
PubMed

Insights

Prenatal alcohol exposure slows processing speed and efficiency in children, particularly in complex cognitive tasks. This deficit partially explains alcohol-related working memory impairments.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Cognitive Science

Background:

  • Prenatal alcohol exposure is linked to cognitive deficits.
  • Studies indicate impaired processing speed in infancy and childhood.

Purpose of the Study:

  • To examine prenatal alcohol-related deficits in processing speed and efficiency.
  • Investigate effects across four cognitive domains.

Main Methods:

  • Assessed 337 Black children (age 7.5) using Sternberg paradigm tasks.
  • Used hierarchical linear modeling to analyze reaction time (RT) and processing efficiency.
  • Compared effortful vs. automatic processing tasks and used path analysis for mediation.

Main Results:

  • Prenatal alcohol exposure correlated with slower processing speed on Sternberg tasks.
  • A specific deficit in processing efficiency was observed in the number comparison task.
  • Slower processing speed partially mediated the relationship between prenatal alcohol exposure and working memory.

Conclusions:

  • Confirms prenatal alcohol exposure slows processing speed in complex cognition, not automatic tasks.
  • Reduced processing speed partially explains alcohol-related working memory deficits.
  • Number comparison processing efficiency was uniquely affected, suggesting a specific prenatal alcohol impact.
Abstract

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