Age-related differences in multi-modal audience design: Young, but not old speakers, adapt speech and gestures to their addressee's knowledge

Speakers can adapt their speech and co-speech gestures for addressees. Here, we investigate whether this ability is modulated by age. Younger and older adults participated in a comic narration task in which one participant (the speaker) narrated six short comic stories to another participant (the addressee). One half of each story was known to both participants, the other half only to the speaker. Younger but not older speakers used more words and gestures when narrating novel story content as opposed to known content. We discuss cognitive and pragmatic explanations of these findings and relate them to theories of gesture production.
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Proceedings paper
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