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 (A → B) and Y means grooming reciprocated (B → A). 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).