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Evolutionary dynamics of language systems

Greenhill, Simon J. ; Wu, Chieh-Hsi ; Hua, Xia ; Dunn, Michael ; Levinson, Stephen C. ; Gray, Russell D.

Proceedings of the National Academy of Sciences - PNAS, 2017-10, Vol.114 (42), p.E8822-E8829 [Periódico revisado por pares]

United States: National Academy of Sciences

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  • Título:
    Evolutionary dynamics of language systems
  • Autor: Greenhill, Simon J. ; Wu, Chieh-Hsi ; Hua, Xia ; Dunn, Michael ; Levinson, Stephen C. ; Gray, Russell D.
  • Assuntos: Biological Sciences ; Dirichlet problem ; Evolution ; Homoplasy ; Language ; language dynamics ; language evolution ; language phylogenies ; Linguistics ; PNAS Plus ; Social Sciences ; Studies ; typology
  • É parte de: Proceedings of the National Academy of Sciences - PNAS, 2017-10, Vol.114 (42), p.E8822-E8829
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    Author contributions: S.J.G., C.-H.W., M.D., S.C.L., and R.D.G. designed research; S.J.G., C.-H.W., X.H., M.D., S.C.L., and R.D.G. performed research; M.D. and S.C.L. contributed new reagents/analytic tools; S.J.G., C.-H.W., and X.H. analyzed data; and S.J.G., C.-H.W., M.D., S.C.L., and R.D.G. wrote the paper.
    Edited by Tomoko Ohta, National Institute of Genetics, Mishima, Japan, and approved July 11, 2017 (received for review January 8, 2017)
  • Descrição: Understanding how and why language subsystems differ in their evolutionary dynamics is a fundamental question for historical and comparative linguistics. One key dynamic is the rate of language change. While it is commonly thought that the rapid rate of change hampers the reconstruction of deep language relationships beyond 6,000–10,000 y, there are suggestions that grammatical structures might retainmore signal over time than other subsystems, such as basic vocabulary. In this study, we use a Dirichlet process mixture model to infer the rates of change in lexical and grammatical data from 81 Austronesian languages. We show that, on average, most grammatical features actually change faster than items of basic vocabulary. The grammatical data show less schismogenesis, higher rates of homoplasy, and more bursts of contact-induced change than the basic vocabulary data. However, there is a core of grammatical and lexical features that are highly stable. These findings suggest that different subsystems of language have differing dynamics and that careful, nuanced models of language change will be needed to extract deeper signal from the noise of parallel evolution, areal readaptation, and contact.
  • Editor: United States: National Academy of Sciences
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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