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Better working memory for non-social targets in infant siblings of children with Autism Spectrum Disorder

Julia S Noland1, J Steven Reznick, Wendy L Stone

  • 1Department of Psychology and Human Development, Peabody, Box #552, 230 Appleton Place, Vanderbilt University, Nashville, TN 37203-5701, USA. julia.noland@vanderbilt.edu

Developmental Science
|February 4, 2010
PubMed

Insights

Infant siblings of children with Autism Spectrum Disorders (sibs-ASD) show enhanced working memory (WM) for non-social targets by 9 months. This early difference in cognitive skills may impact later social development.

Area of Science:

  • Developmental Psychology
  • Cognitive Neuroscience
  • Autism Spectrum Disorder Research

Background:

  • Autism Spectrum Disorder (ASD) is a neurodevelopmental condition with complex origins.
  • Early identification of risk factors and developmental trajectories is crucial for intervention.
  • Working memory (WM) development in infancy is a key area for understanding cognitive differences.

Purpose of the Study:

  • To compare working memory (WM) for social versus non-social targets in infant siblings of children with ASD (sibs-ASD) and typically developing children (sibs-TD).
  • To investigate the emergence of cognitive differences in early development.
  • To explore potential early indicators of neurodevelopmental pathways in infants at risk for ASD.

Main Methods:

  • A comparative study design was employed, assessing infants at 6.5 and 9 months of age.
  • Working memory for location of social and non-social targets was measured in sibs-ASD (n=25) and sibs-TD (n=30).
  • Non-memory measures were used to control for general stimulus processing differences.

Main Results:

  • A significant interaction between risk group and target type on WM was observed.
  • Infant siblings of children with ASD demonstrated superior working memory for non-social targets compared to controls.
  • No significant group differences were found on non-memory control measures.

Conclusions:

  • Infants at risk for ASD exhibit enhanced working memory for non-social stimuli by 9 months of age.
  • This early cognitive strength may represent a distinct developmental pathway.
  • Understanding these early differences is vital for future research on social attention and learning in children at risk for ASD.

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