Figure 4 : Circular distributions of Ai's tapping in 500-ISI and 400ms-ISI conditions; Circular distributions of Ayumu's tapping in 600ms-ISI, 500ms-ISI and 400ms-ISI conditions; Circular distributions of Cleo's tapping in 600ms-ISI, 500ms-ISI and 400ms-ISI conditions.

From: Spontaneous synchronized tapping to an auditory rhythm in a chimpanzee

Figure 4