Precise time-matching in chimpanzee allogrooming does not occur after a short delay
The above plots illustrate time-matching when grooming durations are summed over time windows of 20 minutes, 40 minutes, 1 hour and 4 hours. The values in parentheses in the caption beneath each figure shows the average of the R2 values over each regression within the comparison group. When we separate the data according to the delay Δ we see that most time-matching is accounted for by within-bout activity (A). When we restrict attention to delayed time-matching, the effect largely disappears (B).