Table 6. Percentages of cross-validated correct classifications.
| Geometric morphometrics | Complete (n = 101) | European (n = 39) | African (n = 22) | |||
| F | M | F | M | F | M | |
| PC scores shape space (significant PCs) | 76.6 | 70.4 | 86.4 | 88.2. | 62.5 | 64.3 |
| lnCS | 55.3 | 63.0 | 77.3 | 82.4 | 62.5 | 57.1 |
| PC scores shape space & lnCS | 78.7 | 74.1 | 95.5 | 88.2 | 62.5 | 71.4 |
| Linear data | Complete (n = 139) | European (n = 58) | African (n = 37) | |||
| F | M | F | M | F | M | |
| Sacral width (SW, mm) | 49.2 | 59.5 | 61.3 | 63.0 | 64.3 | 42.9 |
| Corpus width (CW, mm) | 76.9 | 71.6 | 90.3 | 81.5 | 64.3 | 66.7 |
| Corpus depth (CD, mm) | 80.6 | 75.3 | 90.0 | 96.0 | 85.7 | 71.4 |
| Corporo-basal index (CW/SWx100) | 72.3 | 73.0 | 77.4 | 77.8 | 42.9 | 57.1 |
| Corpus-area index (√CWxCD/SWx100) | 76.1 | 71.2 | 83.3 | 92.0 | 42.9 | 57.1 |
| Corpus area (CWxCD) | 82.1 | 72.6 | 93.3 | 96.0 | 78.6 | 66.7 |
| Qualitative investigation | Complete (n = 140) | European (n = 58) | African (n = 37) | |||
| F | M | F | M | F | M | |
| Researcher 1 | 77.7 | 70.7 | 88.7 | 72.2 | 75.0 | 71.4 |
| Researcher 2 | 60.0 | 74.0 | 59.7 | 90.7 | 32.1 | 76.2 |
| Researcher 3 | 72.1 | 58.7 | 64.5 | 74.1 | 60.7 | 54.8 |
Abbreviations: PC, principal component; lnCS, natural logarithm of centroid size; F, female; M, male.