Perspectives on the origin of language: Infants vocalize most during independent vocal play but produce their most speech-like vocalizations during turn taking

• Helen L. Long ,

  Roles Conceptualization, Formal analysis, Investigation, Methodology, Project administration, Resources, Software, Validation, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: helen.long@wisc.edu

  Affiliation Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America

  https://orcid.org/0000-0001-6406-1222

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• Gordon Ramsay,

  Roles Data curation, Formal analysis, Investigation, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing

  Affiliations Marcus Autism Center, Children’s Healthcare of Atlanta, Atlanta, Georgia, United States of America, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, United States of America, Center for Translational Social Neuroscience, Emory University, Atlanta, Georgia, United States of America

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• Ulrike Griebel,

  Roles Conceptualization, Investigation, Methodology, Resources, Writing – original draft, Writing – review & editing

  Affiliations Institute for Intelligent Systems, University of Memphis, Memphis, Tennessee, United States of America, School of Communication Sciences and Disorders, University of Memphis, Memphis, Tennessee, United States of America, Konrad Lorenz Institute for Evolution and Cognition Research, Klosterneuburg, Austria

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• Edina R. Bene,

  Roles Data curation, Investigation, Methodology, Project administration, Resources, Software, Writing – review & editing

  Affiliation School of Communication Sciences and Disorders, University of Memphis, Memphis, Tennessee, United States of America

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• Dale D. Bowman,

  Roles Data curation, Formal analysis, Writing – original draft, Writing – review & editing

  Affiliations Institute for Intelligent Systems, University of Memphis, Memphis, Tennessee, United States of America, Department of Mathematics, University of Memphis, Memphis, Tennessee, United States of America

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• Megan M. Burkhardt-Reed,

  Roles Conceptualization, Investigation, Resources, Visualization, Writing – original draft, Writing – review & editing

  Affiliation School of Communication Sciences and Disorders, University of Memphis, Memphis, Tennessee, United States of America

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• D. Kimbrough Oller

  Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  Affiliations Institute for Intelligent Systems, University of Memphis, Memphis, Tennessee, United States of America, School of Communication Sciences and Disorders, University of Memphis, Memphis, Tennessee, United States of America, Konrad Lorenz Institute for Evolution and Cognition Research, Klosterneuburg, Austria

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