Table 2.
Bayesian regression models analysing elephant success according to their relationship length with the calling mahout (RL: Unknown, < 1 year = Known for less than a year, > 1 year = known for more than a year) and the mahout’s working experience (EXP: Less experienced, Experienced, More experienced). Results from Model 1 are for the control task (N = 51) and results from Model 2 are for the novel surface task (N = 41) Bold = statistically significant variables (CI’s do not encompass 0), italic = tendency effects.
| Explanatory | Estimate ± SE | Lower 95% CI | Upper 95% CI | ||
|---|---|---|---|---|---|
| Control | Model 1 Intercept 1 | Intercept (RL: Unknown / EXP: Less experienced) | 3.57 ± 3.80 | − 2.36 | 11.65 |
| RL: < 1 year | 0.14 ± 1.67 | − 3.19 | 3.54 | ||
| RL: > 1 year | 0.26 ± 1.76 | − 3.30 | 3.67 | ||
| EXP: Experienced | 1.25 ± 1.83 | − 2.09 | 5.23 | ||
| EXP: More experienced | 1.74 ± 2.00 | − 1.80 | 5.94 | ||
| Model 1 Intercept 2 | Intercept (RL: < 1 year / EXP: Experienced) | 4.66 ± 3.52 | − 0.67 | 13.57 | |
| RL: Unknown | − 0.07 ± 1.72 | − 3.42 | 3.38 | ||
| RL: > 1 year | 0.14 ± 1.51 | − 2.76 | 3.08 | ||
| EXP: Less experienced | − 0.99 ± 1.78 | − 4.77 | 2.39 | ||
| EXP: More experienced | 0.58 ± 1.27 | − 1.87 | 3.07 | ||
| Model 1 Intercept 3 | Intercept (RL: > 1 year / EXP: More experienced ) | 5.64 ± 3.68 | 0.01 | 13.90 | |
| RL: Unknown | − 0.34 ± 1.79 | − 3.71 | 2.61 | ||
| RL: < 1 year | − 0.21 ± 1.47 | − 3.03 | 3.23 | ||
| EXP: Experienced | − 0.57 ± 1.25 | − 3.08 | 2.02 | ||
| EXP: Less experienced | − 1.63 ± 1.97 | − 5.58 | 2.07 | ||
| Novel surface | Model 2 Intercept 1 | Intercept (RL: Unknown / EXP: Less experienced) | − 9.06 ± 8.30 | − 26.81 | 0.82 |
| RL: < 1 year | 7.58 ± 8.59 | − 1.25 | 29.21 | ||
| RL: > 1 year | 10.17 ± 9.23 | 0.29 | 33.25 | ||
| EXP: Experienced | − 0.85 ± 2.03 | − 5.19 | 2.87 | ||
| EXP: More experienced | 1.06 ± 1.56 | − 1.83 | 4.40 | ||
| Model 2 Intercept 2 | Intercept (RL: < 1 year / EXP: Experienced) | − 2.59 ± 4.22 | − 11.11 | 6.24 | |
| RL: Unknown | − 7.40 ± 8.29 | − 29.04 | 1.51 | ||
| RL: > 1 year | 2.54 ± 1.95 | − 0.56 | 6.84 | ||
| EXP: Less experienced | 0.89 ± 2.08 | − 3.34 | 4.91 | ||
| EXP: More experienced | 1.93 ± 1.52 | − 0.68 | 5.27 | ||
| Model 2Intercept 3 | Intercept (RL: > 1 year / EXP: More experienced) | 2.04 ± 3.98 | − 4.53 | 11.26 | |
| RL: Unknown | − 9.85 ± 8.00 | − 30.60 | − 0.45 | ||
| RL: < 1 year | − 2.48 ± 2.20 | − 7.28 | 1.05 | ||
| EXP: Experienced | − 1.87 ± 1.53 | − 5.19 | 0.70 | ||
| EXP: Less experienced | − 0.90 ± 1.55 | − 4.31 | 1.89 |