Reconstructing the Evolution of Laughter in Great Apes and Humans

@article{Ross2009ReconstructingTE,
  title={Reconstructing the Evolution of Laughter in Great Apes and Humans},
  author={Marina Davila Ross and M. Owren and E. Zimmermann},
  journal={Current Biology},
  year={2009},
  volume={19},
  pages={1106-1111}
}
It has long been claimed that human emotional expressions, such as laughter, have evolved from nonhuman displays. The aim of the current study was to test this prediction by conducting acoustic and phylogenetic analyses based on the acoustics of tickle-induced vocalizations of orangutans, gorillas, chimpanzees, bonobos and humans. Results revealed both important similarities and differences among the various species' vocalizations, with the phylogenetic tree reconstructed based on these… Expand
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