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

Fig 7

Time-matching in minutes, showing: (A) within-bout only and (B) delayed only.

Here, X means grooming time invested (AB) and Y means grooming reciprocated (BA). Each point on the scatter-plots below represents a pair of grooming events for a single dyad {A, B}. The x-axis indicates the number of minutes that A spent grooming B, and the y-axis represents the time invested by B in grooming A (see text for further description of each panel).

Fig 7

doi: https://doi.org/10.1371/journal.pone.0201810.g007