Evidence for latent classes of IQ in young children with autism spectrum disorder.

Journal Article (Journal Article)

Autism is currently viewed as a spectrum condition that includes strikingly different severity levels; IQ is consistently described as one of the primary aspects of the heterogeneity in autism. To investigate the possibility of more than one distinct subtype of autism based on IQ both latent class analysis and taxometrics methods were used to classify Mullen IQs in a sample of 456 children with autism spectrum disorder. We found evidence for multiple IQbased subgroups using both methods. Groups differed in level of intellectual functioning and patterns of verbal versus nonverbal ability. Results support the notion of distinct subtypes of autism that differ in severity of intellectual ability, patterns of cognitive strengths and weaknesses, and severity of autism symptoms.

Full Text

Duke Authors

Cited Authors

  • Munson, J; Dawson, G; Sterling, L; Beauchaine, T; Zhou, A; Elizabeth, K; Lord, C; Rogers, S; Sigman, M; Estes, A; Abbott, R

Published Date

  • November 2008

Published In

Volume / Issue

  • 113 / 6

Start / End Page

  • 439 - 452

PubMed ID

  • 19127655

Pubmed Central ID

  • PMC2991056

International Standard Serial Number (ISSN)

  • 0895-8017

Digital Object Identifier (DOI)

  • 10.1352/2008.113:439-452


  • eng

Conference Location

  • United States