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

Fig 5

(A) Reciprocity scores (ρd) for within-bout (Δ < 0) grooming by dyad (d): 32 out of 128 dyads exhibit significant asymmetry in grooming durations () at p = 0.05; (B) Reciprocity scores (ρd) for delayed (Δ ≥ 0) grooming: all dyads show significant asymmetry () at p = 0.05.

Fig 5

doi: https://doi.org/10.1371/journal.pone.0201810.g005