Number of errors by substage
| Study | Number of observations | Number of errors reported in each substage | ||||||||||
| 1A | 1B | 1D | 2B | 4A | 6A | 7A | 10A | 10B | 10C | Omission error | ||
| O'Hare21 (UK) | 179 | – | – | – | 25 | – | – | – | 140 | 114 | – | 2 |
| Hartley et al22 (UK) | 323 | – | 9 | – | 5 | – | 0 | 9 | 168 | 2 | 0 | 40 |
| Lammert et al24 (Denmark) | 114 | – | 18 | 0 | 5 | – | 0 | 18 | – | 4 | 0 | – |
| Bruce and Wong25 (UK) | 107 | – | – | – | 3 | – | – | – | 16 | – | – | – |
| Waldau et al26 (Denmark) | 118 | – | 5 | 3 | 3 | – | 1 | 5 | – | 3 | 1 | – |
| Taxis and Barber27 (UK) | 430 | 0 | 12 | – | 36 | 0 | – | 12 | – | 163 | – | 12 |
| Wirtz et al28 (UK, Germany) | 278 | – | – | – | – | – | 0 | – | – | 73 | 0 | – |
| 337 | 0 | 34 | – | 4 | – | – | 34 | – | – | – | 36 | |
| Taxis and Barber29 (Germany) | 122 | 0 | 3 | – | 24 | 0 | – | 3 | – | 3 | – | 1 |
| Cousins et al30 (UK, France, Germany) | 798 | 0 | 13 | – | 228 | – | 8 | 13 | 60 | 171 | 8 | – |
– Indicates no data were collected in the primary study; only the substages where results were reported in the studies are presented.