Table 2.
Results of PCA including all species, specifying 4 components and rotated with Varimax rotation. Variables that contribute with a loading of > |0.40| are shown in bold [Joliffe, 2002]. PC is principal component.Tucker’s congruence coefficients (□) for species similarities are shown at the bottom of the table.
| PC 1 | PC 2 | PC 3 | PC 4 | |
|---|---|---|---|---|
| Behaviors | Sociability | Cautiousness | Aggressiveness | Fearfulness |
| Front of cage | .82 | −.22 | .04 | −.04 |
| Back of cage | −.78 | .12 | −.14 | .03 |
| Reach | .64 | .28 | −.19 | −.05 |
| Lipsmack to tester | −.45 | .60 | −.20 | .11 |
| Quiet face | .41 | −.67 | −.33 | −.18 |
| Ignore tester | .08 | −.76 | −.19 | −.07 |
| Lean or approach tester | .36 | .69 | −.06 | −.14 |
| Open mouth | −.05 | .13 | .79 | −.05 |
| Lunge | .03 | −.02 | .72 | −.01 |
| Threat (tester /conspecific) |
.06 | .04 | .78 | −.03 |
| Shriek | −.06 | .03 | −.03 | .81 |
| Grimace | −.04 | .04 | −.04 | .82 |
|
| ||||
| Eigenvalue | 2.21 | 2.04 | 2.01 | 1.42 |
| Variance Explained | 18.44% | 16.98% | 16.72% | 11.84% |
| Total variance explained | 18.44% | 35.43% | 52.15% | 63.99% |
|
| ||||
| Long-tailed vs. Rhesus | 0.79 | 0.73 | 0.76 | 0.94 |
| Long-tailed vs. Pigtailed | 0.79 | 0.86 | 0.95 | 0.91 |
| Rhesus vs. Pigtailed | 0.80 | 0.71 | 0.64 | 0.98 |