Table 1.
Results of LMM for the engagement of the Sonso chimpanzees with the honey-trap experiment. p-values for intercept and terms comprised in the three-way interaction are omitted. Reference levels for categorical predictors are female (sex), and no (tool use). p-values resulted from likelihood ratio tests.
| β | ± se | t | p | 95% CI | |
|---|---|---|---|---|---|
| Intercept | 0.04 | 0.27 | 0.14 | ||
| Ripe fruit feeding | 0.04 | 0.05 | 0.80 | ||
| Time period | −0.00 | 0.01 | −0.11 | ||
| Travel time | 0.08 | 0.05 | 1.73 | ||
| Sex (male) | −0.31 | 0.40 | −0.78 | 0.4517 | −1.100, 0.473 |
| Age | 1.21 | 0.09 | 13.18 | 0.0000 | 1.028, 1.387 |
| Tool use (yes) | 1.25 | 0.12 | 10.66 | 0.0000 | 1.021, 1.481 |
| Auto correlation | −0.30 | 0.01 | −36.13 | 0.0000 | −0.313, −0.281 |
| Ripe fruit : Time period | −0.00 | 0.01 | −0.54 | ||
| Ripe fruit : Travel time | −0.02 | 0.02 | −1.32 | ||
| Time period : Travel time | 0.01 | 0.01 | 1.44 | ||
| Ripe fruit : Time period : Travel time | −0.02 | 0.01 | −2.40 | 0.0163 | −0.030, −0.003 |