Table 2. Conditional average of phylogenetic generalized least squares (PGLS) model coefficients for lateralization strength and direction in anthropoid primate species.
Bold numbers indicate significant results. VIF = variable inflation factor.
| A: Conditional PGLS model average for lateralization direction, including humans | ||||
|---|---|---|---|---|
| Predictor | Estimate | Std. error | VIF | p value |
| Ecology (terrestrial lifestyle) | 0.153 | 0.072 | 1.499 | 0.040 |
| Tool use (present) | 0.104 | 0.082 | 1.164 | 0.220 |
| Log10 brain size | 0.050 | 0.043 | 1.612 | 0.254 |
| B: Conditional PGLS model average for lateralization direction, excluding humans | ||||
| Predictor | Estimate | Std. error | VIF | p value |
| Ecology (terrestrial lifestyle) Log10 brain size Tool use (present) |
0.108 –0.020 0.003 |
0.056 0.037 0.068 |
1.419 1.405 1.098 |
0.067 0.601 0.962 |
| C: Conditional PGLS model average for lateralization strength | ||||
| Predictor | Estimate | Std. error | VIF | p value |
| Ecology (terrestrial lifestyle) | –0.143 | 0.067 | 1.813 | 0.040 |
| Tool use (present) | 0.060 | 0.070 | 1.235 | 0.402 |
| Log10 brain size | 0.035 | 0.047 | 1.997 | 0.468 |