Table 3. Average intra-observer error by rater.
| Rater 1 | Rater 2 | Rater 3 | |||||
| # | LM | P1 | P2 | P1 | P2 | P1 | P2 |
| 1 | Frontal pole | 1.2 | - | 1.3 | - | 2.1 | - |
| 2 | Occipital pole | 0.93 | - | 0.61 | - | 0.72 | - |
| 3 | Temporal pole | 1.8 | - | 0.48 | - | 1.3 | - |
| 4 | Central s./Lateral s. | 6.6 | 4.8 | 0.74 | 0.99 | 7.4 | 3.6 |
| 5 | Central s. – superior point | 7.3 | 6.8 | 2.7 | 1.1 | 2.1 | 1.8 |
| 6 | Pre-central s./Superior frontal s. | 6.3 | 9.0 | 4.6 | 3.5 | 3.1 | 2.3 |
| 7 | Pre-central s./Inferior frontal s. | 5.2 | 9.2 | 4.0 | 3.6 | 8.1 | 3.9 |
| 8 | Ascending ramus lateral s. | 3.3 | 3.6 | 2.4 | 2.4 | 4.2 | 2.0 |
| 9 | Horizontal ramus lateral s. | 4.3 | 4.0 | 1.5 | 1.8 | 2.8 | 2.5 |
| 10 | Superior temporal s. | 8.3 | 5.3 | 5.1 | 2.4 | 8.3 | 4.7 |
| 11 | Parieto-occipital s. | 5.9 | 5.8 | 1.3 | 0.87 | 1.4 | 1.6 |
| 12 | Cerebellum – lateral pole | 2.1 | - | 0.48 | - | 0.74 | - |
| 13 | Cerebellum – inferior pole | 2.6 | 1.1 | 1.3 | 0.98 | 1.9 | 0.96 |
| 14 | Cerebellum – posterior pole | 2.2 | 1.3 | 1.7 | 1.6 | 3.8 | 1.7 |
| 15 | Cerebellum – superior pole | 0.96 | - | 0.76 | - | 1.4 | - |
| 16 | Fourth ventricle | 0.92 | - | 0.64 | - | 1.3 | - |
| 17 | Amygdala | 2.3 | 2.1 | 1.5 | 1.4 | 1.9 | 1.8 |
| 18 | Caudate nucleus | 1.5 | - | 0.92 | - | 1.5 | - |
| 19 | Thalamus | 1.8 | - | 1.1 | - | 1.6 | - |
| 20 | Corpus callosum – genu | 1.1 | - | 0.59 | - | 0.96 | - |
| 21 | Corpus callosum – midbody | 2.7 | - | 0.73 | - | 0.99 | - |
| 22 | Corpus callosum – splenium | 0.95 | - | 0.55 | - | 0.85 | - |
| 23 | Anterior commissure | 1.1 | - | 0.45 | - | 0.74 | - |
| 24 | Pons - inferior | 1.2 | - | 0.57 | - | 0.98 | - |
| 25 | Pons - superior | 1.2 | - | 0.63 | - | 0.81 | - |
| 26 | Superior colliculus | 1.4 | - | 0.68 | - | 1.1 | - |
| 27 | Left ventricle - anterior horn | 0.92 | - | 0.69 | - | 0.54 | - |
| 28 | Left ventricle - inferior horn | 3.0 | 2.6 | 0.73 | 1.1 | 2.0 | 2.3 |
| 29 | Left ventricle posterior horn | 5.8 | 1.2 | 4.0 | 1.5 | 2.5 | 2.4 |
In the landmark name, the backslash (/) indicates that the landmark is located at the intersection of the two sulci. P1 is the imprecision (mm) for each landmark in the first round of analysis. P2 is the imprecision (mm) for each landmark in the second round of analysis using the modified protocols. The hyphen (-) indicates that the landmark was not reassessed in the second round of analysis.