チンパンジーにおけるタッピング行動の同調

• ユ リラ

  京都大・霊長研

• 友永 雅己

  京都大・霊長研

書誌事項

タイトル別名

• Does synchronous tapping movement emerge in pairs of chimpanzees?

抄録

It has been well documented that we humans have a strong tendency to mimic others’ behavior. This phenomenon has been termed as chameleon effect and it is known to facilitate affiliation during social interaction. Recently, the positive social consequence of chameleon effect in capuchin monkeys was reported (Paukner et al., 2009). Parallel to humans, the capuchin monkey preferred human imitators over non-imitators in various ways. However questions are remaining whether non-human primates actually mimic enough while interacting with others in their natural social group to raise the affiliation and how far the mimicry become automatized. The present experiment aimed at examining an emergence of synchronous behavior in chimpanzees (Pan troglodytes), who are an evolutionary the closest relative to humans and one of a highly social non-human primates. We assumed chimpanzees may show relatively more behavioral synchrony rather than imitation to serve the affiliative function because they often produce rhythmic movement while interacting with other chimpanzees, such as body-rocking during vocalization, a group of walk and so on. To test this, we introduced a task which produces a rhythmic finger-tapping movement. During the experiment, pairs of chimpanzees (three pairs; six individuals in total) sat side-by-side and conducted the task simultaneously. Auditory information of the movement was shared between individuals through auditory-feedback but not visual information. Two auditory conditions were prepared; auditory-coupled and -swapped conditions. The feedback sounds were provided in front of each individual’s monitor during the auditory-coupled condition. On the other hand, the feedback sounds of own were played in his partner’s monitor and vice versa, during the auditory-swapped condition. Results revealed that there is no clear evidence of behavioral synchrony in chimpanzees, meaning that the rhythmic taps between pairs did not get close to each other even they heard the partner’s tapping movement. However, we found significant tapping speed and variability changes during the auditory-swapped condition. Unlike humans, behavioral synchrony may be rare as well as imitation in chimpanzees. On the other hand, auditory information of the movement without any sensory information may not be enough to produce the synchronous tapping in chimpanzees. Further experiments under visual-coupled condition are planned to investigate the latter assumption.

収録刊行物

• 霊長類研究　Supplement

  霊長類研究　Supplement 28 (0), 80-, 2012

  日本霊長類学会

詳細情報

• CRID: 1390282680610679552
• NII論文ID: 130005471392
• DOI: 10.14907/primate.28.0_80
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可