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      A Dynamical Model of Hierarchical Selection and Coordination in Speech Planning

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      PLoS ONE
      Public Library of Science

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          Abstract

          Studies of the control of complex sequential movements have dissociated two aspects of movement planning: control over the sequential selection of movement plans, and control over the precise timing of movement execution. This distinction is particularly relevant in the production of speech: utterances contain sequentially ordered words and syllables, but articulatory movements are often executed in a non-sequential, overlapping manner with precisely coordinated relative timing. This study presents a hybrid dynamical model in which competitive activation controls selection of movement plans and coupled oscillatory systems govern coordination. The model departs from previous approaches by ascribing an important role to competitive selection of articulatory plans within a syllable. Numerical simulations show that the model reproduces a variety of speech production phenomena, such as effects of preparation and utterance composition on reaction time, and asymmetries in patterns of articulatory timing associated with onsets and codas. The model furthermore provides a unified understanding of a diverse group of phonetic and phonological phenomena which have not previously been related.

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          Author and article information

          Contributors
          Role: Editor
          Journal
          PLoS One
          PLoS ONE
          plos
          plosone
          PLoS ONE
          Public Library of Science (San Francisco, USA )
          1932-6203
          2013
          24 April 2013
          : 8
          : 4
          : e62800
          Affiliations
          [1]Department of Linguistics, Cornell University, Ithaca, New York, United States of America
          McMaster University, Canada
          Author notes

          Competing Interests: The author has declared that no competing interests exist.

          Conceived and designed the experiments: ST. Performed the experiments: ST. Analyzed the data: ST. Contributed reagents/materials/analysis tools: ST. Wrote the paper: ST.

          Article
          PONE-D-12-29335
          10.1371/journal.pone.0062800
          3634742
          23638147
          a92880c4-974b-4bff-bf5a-755bb387e433
          Copyright @ 2013

          This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

          History
          : 24 September 2012
          : 25 March 2013
          Page count
          Pages: 18
          Funding
          This author has no support or funding to report.
          Categories
          Research Article
          Biology
          Neuroscience
          Cognitive Neuroscience
          Motor Reactions
          Computational Neuroscience
          Motor Systems
          Neural Networks
          Neurolinguistics
          Social and Behavioral Sciences
          Linguistics
          Computational Linguistics
          Natural Language
          Neurolinguistics
          Phonology
          Psycholinguistics
          Speech
          Psychology
          Behavior
          Human Performance
          Verbal Behavior

          Uncategorized
          Uncategorized

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