Table 1. Scent identification matching procedures performed by one dog.
| Dog ID | Type of twins | Matching procedure (in random order) | Number of line-ups | Correct results (n) | Incorrect results (n) |
| Gabi | Monozygotic twins | 1A×1A | 5 | 1 | 0 |
| 1A×1B | 5 | 1 | 0 | ||
| 1B×1B | 5 | 1 | 0 | ||
| 2A×2A | 5 | 1 | 0 | ||
| 2A×2B | 5 | 1 | 0 | ||
| 2B×2B | 5 | 1 | 0 | ||
| Dizygotic twins | 3A×3A | 5 | 1 | 0 | |
| 3A×3B | 5 | 1 | 0 | ||
| 3B×3B | 5 | 1 | 0 | ||
| 4A×4A | 5 | 1 | 0 | ||
| 4A×4B | 5 | 1 | 0 | ||
| 4B×4B | 5 | 1 | 0 | ||
| Total: | 60 | 12 | 0 |
As all dogs used in the experiment performed in exactly the same way, with no incorrect alerts, performance of other dogs are not shown.