Table 2 Matrix representing the percentage of the different ‘variant’ combinations in vocal exchanges (n = 192 pairs of consecutive calls).

From: Social bonding drives vocal exchanges in Bonobos

Voc 1

Voc 2

A

B

C

D

E

F

A (62)

48.4 (30)

17.7

22.6

9.7

1.6

0

B (51)

29.4

37.3 (19)

19.6

9.8

3.9

0

C (50)

22

26

30 (15)

14

4

4

D (19)

42.1

15.8

21.1

21.1 (4)

0

0

E (5)

0

20

20

40

20 (1)

0

F (5)

40

0

20

20

0

20 (1)

  1. On the first left column, “Voc 1” is the ‘variant’ starting a vocal exchange and in bracket is the number of observations where each variant was produced in first position. “Voc 2” is the ‘variant’ given in “response” namely produced within a maximum delay of 2.5 sec (see the body text for the definition of this threshold). ‘Variant’ matching is on the diagonal line and in brackets is the number of vocal exchanges where Voc 2 was the same that Voc 1.
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