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Sci Rep. 2013;3:1151. doi: 10.1038/srep01151. Epub 2013 Jan 28.

Spontaneous synchronization of arm motion between Japanese macaques.

Author information

1
Laboratory for Adaptive Intelligence, Brain Science Institute , RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

Abstract

Humans show spontaneous synchronization of movements during social interactions; this coordination has been shown to facilitate smooth communication. Although human studies exploring spontaneous synchronization are increasing in number, little is known about this phenomenon in other species. In this study, we examined spontaneous behavioural synchronization between monkeys in a laboratory setting. Synchronization was quantified by changes in button-pressing behaviour while pairs of monkeys were facing one another. Synchronization between the monkeys was duly observed and it was participant-partner dependent. Further tests confirmed that the speed of button pressing changed to harmonic or sub-harmonic levels in relation to the partner's speed. In addition, the visual information from the partner induced a higher degree of synchronization than auditory information. This study establishes advanced tasks for testing social coordination in monkeys, and illustrates ways in which monkeys coordinate their actions to establish synchronization.

PMID:
23359601
PMCID:
PMC3556593
DOI:
10.1038/srep01151
[Indexed for MEDLINE]
Free PMC Article

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