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Monkeys and Humans Share a Common Computation for Face/Voice Integration
Speech production involves the movement of the mouth and other regions of the face resulting in visual motion cues. These visual cues enhance intelligibility and detection of auditory speech. As such, face-to-face speech is fundamentally a multisensory phenomenon. If speech is fundamentally multisen...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3182859/ https://www.ncbi.nlm.nih.gov/pubmed/21998576 http://dx.doi.org/10.1371/journal.pcbi.1002165 |
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author | Chandrasekaran, Chandramouli Lemus, Luis Trubanova, Andrea Gondan, Matthias Ghazanfar, Asif A. |
author_facet | Chandrasekaran, Chandramouli Lemus, Luis Trubanova, Andrea Gondan, Matthias Ghazanfar, Asif A. |
author_sort | Chandrasekaran, Chandramouli |
collection | PubMed |
description | Speech production involves the movement of the mouth and other regions of the face resulting in visual motion cues. These visual cues enhance intelligibility and detection of auditory speech. As such, face-to-face speech is fundamentally a multisensory phenomenon. If speech is fundamentally multisensory, it should be reflected in the evolution of vocal communication: similar behavioral effects should be observed in other primates. Old World monkeys share with humans vocal production biomechanics and communicate face-to-face with vocalizations. It is unknown, however, if they, too, combine faces and voices to enhance their perception of vocalizations. We show that they do: monkeys combine faces and voices in noisy environments to enhance their detection of vocalizations. Their behavior parallels that of humans performing an identical task. We explored what common computational mechanism(s) could explain the pattern of results we observed across species. Standard explanations or models such as the principle of inverse effectiveness and a “race” model failed to account for their behavior patterns. Conversely, a “superposition model”, positing the linear summation of activity patterns in response to visual and auditory components of vocalizations, served as a straightforward but powerful explanatory mechanism for the observed behaviors in both species. As such, it represents a putative homologous mechanism for integrating faces and voices across primates. |
format | Online Article Text |
id | pubmed-3182859 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-31828592011-10-13 Monkeys and Humans Share a Common Computation for Face/Voice Integration Chandrasekaran, Chandramouli Lemus, Luis Trubanova, Andrea Gondan, Matthias Ghazanfar, Asif A. PLoS Comput Biol Research Article Speech production involves the movement of the mouth and other regions of the face resulting in visual motion cues. These visual cues enhance intelligibility and detection of auditory speech. As such, face-to-face speech is fundamentally a multisensory phenomenon. If speech is fundamentally multisensory, it should be reflected in the evolution of vocal communication: similar behavioral effects should be observed in other primates. Old World monkeys share with humans vocal production biomechanics and communicate face-to-face with vocalizations. It is unknown, however, if they, too, combine faces and voices to enhance their perception of vocalizations. We show that they do: monkeys combine faces and voices in noisy environments to enhance their detection of vocalizations. Their behavior parallels that of humans performing an identical task. We explored what common computational mechanism(s) could explain the pattern of results we observed across species. Standard explanations or models such as the principle of inverse effectiveness and a “race” model failed to account for their behavior patterns. Conversely, a “superposition model”, positing the linear summation of activity patterns in response to visual and auditory components of vocalizations, served as a straightforward but powerful explanatory mechanism for the observed behaviors in both species. As such, it represents a putative homologous mechanism for integrating faces and voices across primates. Public Library of Science 2011-09-29 /pmc/articles/PMC3182859/ /pubmed/21998576 http://dx.doi.org/10.1371/journal.pcbi.1002165 Text en Chandrasekaran et al. http://creativecommons.org/licenses/by/4.0/ 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 properly credited. |
spellingShingle | Research Article Chandrasekaran, Chandramouli Lemus, Luis Trubanova, Andrea Gondan, Matthias Ghazanfar, Asif A. Monkeys and Humans Share a Common Computation for Face/Voice Integration |
title | Monkeys and Humans Share a Common Computation for Face/Voice Integration |
title_full | Monkeys and Humans Share a Common Computation for Face/Voice Integration |
title_fullStr | Monkeys and Humans Share a Common Computation for Face/Voice Integration |
title_full_unstemmed | Monkeys and Humans Share a Common Computation for Face/Voice Integration |
title_short | Monkeys and Humans Share a Common Computation for Face/Voice Integration |
title_sort | monkeys and humans share a common computation for face/voice integration |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3182859/ https://www.ncbi.nlm.nih.gov/pubmed/21998576 http://dx.doi.org/10.1371/journal.pcbi.1002165 |
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