Journal of Autism and Developmental Disorders

, Volume 47, Issue 2, pp 260–274

Investigating the Receptive-Expressive Vocabulary Profile in Children with Idiopathic ASD and Comorbid ASD and Fragile X Syndrome

Original Paper

DOI: 10.1007/s10803-016-2921-3

Cite this article as:
Haebig, E. & Sterling, A. J Autism Dev Disord (2017) 47: 260. doi:10.1007/s10803-016-2921-3

Abstract

Previous work has noted that some children with autism spectrum disorder (ASD) display weaknesses in receptive vocabulary relative to expressive vocabulary abilities. The current study extended previous work by examining the receptive-expressive vocabulary profile in boys with idiopathic ASD and boys with concomitant ASD and fragile X syndrome (ASD + FXS). On average, boys with ASD + FXS did not display the same atypical receptive-expressive profile as boys with idiopathic ASD. Notably, there was variation in vocabulary abilities and profiles in both groups. Although we did not identify predictors of receptive-expressive differences, we demonstrated that nonverbal IQ and expressive vocabulary positively predicted concurrent receptive vocabulary knowledge and receptive vocabulary predicted expressive vocabulary. We discuss areas of overlap and divergence in subgroups of ASD.

Keywords

Autism spectrum disorder Fragile X syndrome Language phenotype Vocabulary 

Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Department of Communication Sciences and Disorders, Waisman CenterUniversity of Wisconsin-MadisonMadisonUSA
  2. 2.Department of Speech, Language, & Hearing SciencesPurdue UniversityWest LafayetteUSA

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