Links between looking and speaking in autism and first-degree relatives: Insights into the expression of genetic liability to autism

Kritika Nayar, Peter C. Gordon, Gary E. Martin, Abigail L. Hogan, Chelsea La Valle, Walker McKinney, Michelle Lee, Elizabeth S. Norton, Molly Losh*

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Background: Rapid automatized naming (RAN; naming of familiar items presented in an array) is a task that taps fundamental neurocognitive processes that are affected in a number of complex psychiatric conditions. Deficits in RAN have been repeatedly observed in autism spectrum disorder (ASD), and also among first-degree relatives, suggesting that RAN may tap features that index genetic liability to ASD. This study used eye tracking to examine neurocognitive mechanisms related to RAN performance in ASD and first-degree relatives, and investigated links to broader language and clinical-behavioral features. Methods: Fifty-one individuals with ASD, biological parents of individuals with ASD (n = 133), and respective control groups (n = 45 ASD controls; 58 parent controls) completed RAN on an eye tracker. Variables included naming time, frequency of errors, and measures of eye movement during RAN (eye-voice span, number of fixations and refixations). Results: Both the ASD and parent-ASD groups showed slower naming times, more errors, and atypical eye-movement patterns (e.g., increased fixations and refixations), relative to controls, with differences persisting after accounting for spousal resemblance. RAN ability and associated eye movement patterns were correlated with increased social-communicative impairment and increased repetitive behaviors in ASD. Longer RAN times and greater refixations in the parent-ASD group were driven by the subgroup who showed clinical-behavioral features of the broad autism phenotype (BAP). Finally, parent-child dyad correlations revealed associations between naming time and refixations in parents with the BAP and increased repetitive behaviors in their child with ASD. Conclusions: Differences in RAN performance and associated eye movement patterns detected in ASD and in parents, and links to broader social-communicative abilities, clinical features, and parent-child associations, suggest that RAN-related abilities might constitute genetically meaningful neurocognitive markers that can help bridge connections between underlying biology and ASD symptomatology.

Original languageEnglish (US)
Article number51
JournalMolecular Autism
Volume9
Issue number1
DOIs
StatePublished - Oct 10 2018

Keywords

  • Autism spectrum disorder
  • Broad autism phenotype
  • Endophenotype
  • Eye movement
  • Eye-voice span
  • Gaze
  • Language
  • Rapid automatized naming
  • Restricted and repetitive behaviors
  • Social communication

ASJC Scopus subject areas

  • Molecular Biology
  • Developmental Neuroscience
  • Developmental Biology
  • Psychiatry and Mental health

Fingerprint Dive into the research topics of 'Links between looking and speaking in autism and first-degree relatives: Insights into the expression of genetic liability to autism'. Together they form a unique fingerprint.

  • Cite this