A study on coordination between gesture and speech from the viewpoint of speech mechanism

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The present study focuses on the link between speech and gesture which is iconic representation of concepts with hands. More specifically, it investigates whether the two modules operate independently during speech production or they are interconnected through mutual monitoring. In the experiment, speakers engage in a description task while their hands are attached to a board and thus immobile (gesture restriction condition) and while there is no restriction on hand movements (free gesture condition). Speech fluency, frequency of onomatopoetic words, and voice quality were examined to see if they vary according to the availability of hands.