| OBSERVER | NUMBER | MEAN %E | M E | NUMBER | MEAN %E | M E |
| GUTH DR V | 4 | 2.0603 | 0.4311 | 24 | 1.9806 | 0.1346 |
| DZUBAK M & GAERTNER L | 11 | 2.0837 | 0.2158 | 11 | 1.7916 | 0.3396 |
| LEFTUS V & PLAVEC M | 10 | 2.2621 | 0.2621 | 4 | 2.0233 | 0.5872 |
| BROZ F & KAMBERSKY J | 1 | 1.2396 | 0.0000 | 6 | 3.3472 | 0.1798 |
| BUCHAR E | 22 | 2.6959 | 0.1047 | 16 | 1.9668 | 0.0839 |