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Research Article

Chimpanzees Show a Developmental Increase in Susceptibility to Contagious Yawning: A Test of the Effect of Ontogeny and Emotional Closeness on Yawn Contagion

  • Elainie Alenkær Madsen mail,

    Elainie.Madsen@gmail.com

    Affiliations: Department of Cognitive Science, Lund University, Lund, Sweden, Department of Semiotics, Centre for Languages and Literature, Lund University, Lund, Sweden

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  • Tomas Persson,

    Affiliation: Department of Cognitive Science, Lund University, Lund, Sweden

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  • Susan Sayehli,

    Affiliations: Department of Linguistics, Centre for Languages and Literature, Lund University, Lund, Sweden, Humanities Lab, Lund University, Lund, Sweden

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  • Sara Lenninger,

    Affiliation: Department of Semiotics, Centre for Languages and Literature, Lund University, Lund, Sweden

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  • Göran Sonesson

    Affiliation: Department of Semiotics, Centre for Languages and Literature, Lund University, Lund, Sweden

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  • Published: October 16, 2013
  • DOI: 10.1371/journal.pone.0076266

About the Authors

Elainie Alenkær Madsen, Tomas Persson
Department of Cognitive Science, Lund University, Lund, Sweden
Elainie Alenkær Madsen, Sara Lenninger, Göran Sonesson
Department of Semiotics, Centre for Languages and Literature, Lund University, Lund, Sweden
Susan Sayehli
Department of Linguistics, Centre for Languages and Literature, Lund University, Lund, Sweden
Susan Sayehli
Humanities Lab, Lund University, Lund, Sweden

Corresponding Author

Email: Elainie.Madsen@gmail.com

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: EAM TP GS SS SL. Performed the experiments: EAM. Analyzed the data: EAM TP. Wrote the paper: EAM TP GS SS SL.