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Precise time-matching in chimpanzee allogrooming does not occur after a short delay

Fig 1

Schematic illustration of the data collection method, consisting of continuous all-occurrence sampling of grooming events within vicinity of a designated focal animal (for scan of actual datasheet, see ref. [49], p. 32).

The original reason for designing the data sheet this way was to record the occurrence of polyadic grooming cliques: chimpanzees often groom within larger gatherings of individuals, which causes clusters of polyadic grooming [49], [57], such as triads (e.g. ABC), quartets (e.g. ABCD), or larger. Polyadic grooming is not the topic of the current paper, but the data sheets were usable for the analysis of dyadic grooming.

Fig 1

doi: https://doi.org/10.1371/journal.pone.0201810.g001