TABLE 3.
Distribution of hand preferences for 10 measures of hand use in chimpanzees from three field sites
|
Study Site |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
|
Gombe |
Mahale |
Tai |
|||||||
| #L | #R | #A | #L | #R | #A | #L | #R | #A | |
| Scratch | 13 | 23 | 2 | 1 | 0 | 42 | |||
| Groom | 14 | 18 | 2 | 2 | 5 | 29 | 0 | 6 | 9 |
| Eat | 21 | 13 | 4 | 0 | 1 | 40 | |||
| Pluck | 15 | 19 | 2 | 1 | 0 | 39 | |||
| Pick-up | 13 | 8 | 4 | 0 | 0 | 10 | 5 | 6 | 9 |
| Hold | 11 | 13 | 1 | 8 | 12 | 10 | |||
| Nose wipe | 10 | 17 | 5 | 6 | 0 | 32 | |||
| Pull | 22 | 11 | 2 | 0 | 0 | 35 | |||
| Cradle | 3 | 7 | 2 | 1 | 0 | 6 | |||
| Reach | — | — | — | 0 | 0 | 5 | |||
L = Left, A = Ambiguous, R = Right.
Data from Boesch, 1991; Marchant & McGrew, 1996; McGrew & Marchant, 2001; Sugiyama et al., 1993.