Journal
PRIMATES
Volume 57, Issue 2, Pages 181-185Publisher
SPRINGER JAPAN KK
DOI: 10.1007/s10329-016-0512-8
Keywords
Synchrony; Chimpanzees; Finger-tapping task; Tempo convergence
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Funding
- JSPS [20002001, 23220006, 24000001, 15H05709, 244525]
- Grants-in-Aid for Scientific Research [20002001, 15H05709, 24000001, 23220006] Funding Source: KAKEN
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Many studies have reported a spontaneous nature to synchronized movement in humans and in non-human primates. However, it is not yet clear whether individuals mutually adapt their movement to each other or whether one individual significantly changes to synchronize with the other. In the current study, we examined a directionality of the tempo adaptation to understand an introductive process of interactional synchrony in pairs of chimpanzees. Four pairs, consisting of five female chimpanzees, produced a finger-tapping movement under a face-to-face experimental setup where both auditory and visual cues of the partner's movement were available. Two test conditions were prepared: alone and paired. An analysis of the tapping tempo depending on condition showed that only one chimpanzee in each pair significantly changed their tapping tempo in the direction of the partner's tapping tempo in the paired condition compared with the alone condition. The current study demonstrated that unidirectional adaptation in tempo occurs in pairs of chimpanzees when they simultaneously produce the tapping movement under auditory and visual interaction.
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