Journal of Autism and Developmental Disorders

, Volume 39, Issue 10, pp 1392–1400 | Cite as

Laughter Differs in Children with Autism: An Acoustic Analysis of Laughs Produced by Children With and Without the Disorder

  • William J. Hudenko
  • Wendy Stone
  • Jo-Anne Bachorowski
Original Paper

Abstract

Few studies have examined vocal expressions of emotion in children with autism. We tested the hypothesis that during social interactions, children diagnosed with autism would exhibit less extreme laugh acoustics than their nonautistic peers. Laughter was recorded during a series of playful interactions with an examiner. Results showed that children with autism exhibited only one type of laughter, whereas comparison participants exhibited two types. No group differences were found for laugh duration, mean fundamental frequency (F0) values, change in F0, or number of laughs per bout. Findings are interpreted to suggest that children with autism express laughter primarily in response to positive internal states, rather than using laughter to negotiate social interactions.

Keywords

Autism Laughter Emotion Affect Expression Acoustics 

Notes

Acknowledgments

This research was supported by a Vanderbilt University Discovery Grant awarded to Jo-Anne Bachorowski and Wendy Stone. Research from this study was completed in partial fulfillment of the requirements for the doctoral dissertation of William Hudenko. We appreciate the support of the parents who made this research possible, and thank participating schools and childcare programs in the greater Nashville, TN, area for their assistance with locating comparison participants. We would like to acknowledge Shannon Bader, Nia Toomer, and Kim Brooks for their assistance with this research.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • William J. Hudenko
    • 1
    • 2
  • Wendy Stone
    • 1
  • Jo-Anne Bachorowski
    • 1
  1. 1.Vanderbilt UniversityNashvilleUSA
  2. 2.Department of PsychologyIthaca CollegeIthacaUSA

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