Table 2.
Rating of the hierarchical nature of social interactions and the tolerance of eye contact for each primate. Social structure is scored on a 0 (completely hierarchical) to 100 (completely egalitarian) point scale. Eye contact tolerance is scored on a 0 (no tolerance) to 100 (high tolerance) point scale.
| Primates | n | Social Structure Rating | Eye Contact Tolerance | ||
|---|---|---|---|---|---|
| M | SD | M | SD | ||
| Howler | 2 | 20 | 14.14 | 80 | 0 |
| Muriqui | 1 | 100 | NA | 90 | NA |
| Titi | 1 | 100 | NA | 100 | NA |
| Capuchin | 6 | 33.33 | 22.29 | 61.25 | 22.52 |
| Marmoset | 4 | 69.25 | 40.57 | 77 | 13.26 |
| Diana | 1 | 87 | NA | 96 | NA |
| Vervet | 2 | 21 | 1.41 | 68.5 | 2.12 |
| Colobus | 2 | 40 | 14.14 | 40.25 | 14.5 |
| Lemur | 2 | 56 | 36.77 | 82.5 | 24.75 |
| Gorilla | 2 | 5 | 7.07 | 18 | 1.41 |
| Gibbon | 3 | 58.33 | 28.43 | 44.75 | 3.89 |
| Woolly | 1 | 90 | NA | 100 | NA |
| Rhesus Macaque | 10 | 16.8 | 14.79 | 49.95 | 30.31 |
| Chimpanzee | 8 | 28.88 | 36.71 | 59.19 | 29.71 |
| Bonobo | 3 | 60 | 17.32 | 83.83 | 13.29 |
| Orangutan | 3 | 57.67 | 6.81 | 71.83 | 20.25 |
| Tamarin | 2 | 86 | 5.66 | 82.75 | 10.25 |
| Siamang | 1 | 68 | NA | 71 | NA |
| Squirrel | 1 | 85 | NA | 90 | NA |