Journal of Autism and Developmental Disorders

, Volume 39, Issue 11, pp 1613–1619

Brief Report: IQ Split Predicts Social Symptoms and Communication Abilities in High-Functioning Children with Autism Spectrum Disorders

  • David O. Black
  • Gregory L. Wallace
  • Jennifer L. Sokoloff
  • Lauren Kenworthy
Brief Report

Abstract

We investigated the relationship of discrepancies between VIQ and NVIQ (IQ split) to autism symptoms and adaptive behavior in a sample of high-functioning (mean FSIQ = 98.5) school-age children with autism spectrum disorders divided into three groups: discrepantly high VIQ (n = 18); discrepantly high NVIQ (n = 24); and equivalent VIQ and NVIQ (n = 36). Discrepantly high VIQ and NVIQ were associated with autism social symptoms but not communication symptoms or repetitive behaviors. Higher VIQ and NVIQ were associated with better adaptive communication but not socialization or Daily Living Skills. IQ discrepancy may be an important phenotypic marker in autism. Although better verbal abilities are associated with better functional outcomes in autism, discrepantly high VIQ in high-functioning children may also be associated with social difficulties.

Keywords

Autism Cognitive profiles IQ Symptomatology Adaptive functioning Asperger syndrome 

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Copyright information

© GovernmentEmployee: National Institute of Mental Health, National Institutes of Health 2009

Authors and Affiliations

  • David O. Black
    • 1
  • Gregory L. Wallace
    • 2
  • Jennifer L. Sokoloff
    • 3
  • Lauren Kenworthy
    • 3
  1. 1.Pediatric Developmental Neuroscience BranchNational Institute of Mental HealthBethesdaUSA
  2. 2.Laboratory of Brain & CognitionNational Institute of Mental HealthBethesdaUSA
  3. 3.Center for Autism Spectrum DisordersChildren’s National Medical CenterRockvilleUSA

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