Atypicalities of Gesture Form and Function in Autistic Adults

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TitleAtypicalities of Gesture Form and Function in Autistic Adults
Publication TypeJournal Article
Year of Publication2019
Authorsde Marchena, A, Kim, ES, Bagdasarov, A, Parish-Morris, J, Maddox, BB, Brodkin, ES, Schultz, RT
JournalJournal of autism and developmental disorders

While well-represented on clinical measures, co-speech gesture production has never been formally studied in autistic adults. Twenty-one verbally fluent autistic adults and 21 typically developing controls engaged in a controlled conversational task. Group differences were observed in both semantic/pragmatic and motoric features of spontaneously produced co-speech gestures. Autistic adults prioritized different functions of co-speech gesture. Specifically, they used gesture more than controls to facilitate conversational turn-taking, demonstrating a novel nonverbal strategy for regulating conversational dynamics. Autistic adults were more likely to gesture unilaterally than bilaterally, a motoric feature of gesture that was individually associated with autism symptoms. Co-speech gestures may provide a link between nonverbal communication symptoms and known differences in motor performance in autism.