Language Skills of Males with Fragile X Syndrome or Nonsyndromic Autism Spectrum Disorder

Angela John Thurman, Andrea McDuffie, Randi J Hagerman, Cynde K. Josol, Leonard J Abbeduto

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Despite the similarities observed between the fragile X syndrome (FXS) and autism spectrum disorder (ASD) phenotypes, few studies have compared their behavioral profiles outside of ASD symptomatology. In the present study, we sought to compare lexical and grammatical abilities in these two conditions. Comparisons of language abilities in both of these conditions are particularly interesting because both conditions are characterized by difficulties navigating social interactions. Results suggest that although both FXS and ASD are associated with language difficulties, there are important differences between the two conditions in terms of the language profiles observed and the factors influencing language when considering children of similar developmental levels. Theoretical implications are discussed.

Original languageEnglish (US)
Pages (from-to)728-743
Number of pages16
JournalJournal of Autism and Developmental Disorders
Issue number3
StatePublished - Mar 1 2017


  • Autism spectrum disorder
  • Fragile X syndrome
  • Language

ASJC Scopus subject areas

  • Developmental and Educational Psychology


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