Title

Laughter differs in children with autism: An acoustic analysis of laughs produced by children with and without the disorder

Document Type

Article

Publication Date

5-18-2009

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 (F ) values, change in F , 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. © 2009 Springer Science+Business Media, LLC. 0 0

Publication Name

Journal of Autism and Developmental Disorders

Volume Number

39

First Page

1392

Last Page

1400

Issue Number

10

DOI

10.1007/s10803-009-0752-1

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