Evidence for Latent Classes of IQ in Young Children With Autism Spectrum Disorder

Author:

Munson Jeffrey1,Dawson Geraldine1,Sterling Lindsey1,Beauchaine Theodore1,Zhou Andrew1,Koehler Elizabeth1,Lord Catherine2,Rogers Sally3,Sigman Marian4,Estes Annette1,Abbott Robert1

Affiliation:

1. University of Washington

2. University of Michigan

3. University of California Davis Medical Center

4. University of California Los Angeles

Abstract

Abstract 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 IQ-based 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.

Publisher

American Association on Intellectual and Developmental Disabilities (AAIDD)

Subject

Developmental and Educational Psychology,General Health Professions,Rehabilitation,Education

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