Exploring expressive communication skills in a cross-sectional sample of individuals with a dual diagnosis of autism spectrum disorder and down syndrome

Alexandria Cook, Emily D. Quinn, Charity Rowland

Research output: Contribution to journalArticlepeer-review

Abstract

Individuals with a comorbid diagnosis of Down syndrome (DS) and autism spectrum disorder (ASD) have been found to exhibit greater deficits in expressive communication than individuals with DS only. We hypothesized that individuals with a comorbid diagnosis (n = 430) would have significantly lower Communication Matrix scores and specifically social communication scores than individuals with DS alone (n = 4,352). In a sample of 4,782 individuals with DS, scores for individuals with a comorbid diagnosis were on average 18.01 points and 7.26 points lower for total score and social score respectively as compared to individuals with DS. Comorbid diagnosis accounted for 10.5% of the variance in communication scores. Between-group differences in referential gestures and symbolic communication behaviors were also observed.

Original languageEnglish (US)
Pages (from-to)97-113
Number of pages17
JournalAmerican Journal on Intellectual and Developmental Disabilities
Volume126
Issue number2
DOIs
StatePublished - Mar 2021
Externally publishedYes

Keywords

  • Autism spectrum disorder
  • Communication
  • Down syndrome
  • Intellectual disability
  • Language

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Neuropsychology and Physiological Psychology
  • Developmental and Educational Psychology
  • Arts and Humanities (miscellaneous)
  • Clinical Neurology
  • Psychiatry and Mental health

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