Table II.
Mean (SD) effective‐N over all voxels (VBM)/ vertices (CORT) for group (d lim) and twin studies (h ) for the four sites and the 4‐pool
| Site | VBM | CORT | ||
|---|---|---|---|---|
| Twin | Group | Twin | Group | |
| Utrecht | 8.8 (12.4) | 28.2 (11.7) | 3.7 (8.6) | 23.5 (12.2) |
| Jena | 10.4 (13.3) | 29.3 (11.2) | 2.9 (7.8) | 22.1 (12.1) |
| London | 8.4 (12.5) | 27.5 (11.9) | 2.5 (7.1) | 20.7 (12.4) |
| Heidelberg | 7.2 (12.4) | 25.3 (12.7) | 2.6 (8.2) | 17.2 (13.1) |
| 4‐pool | 54.0 (45.6) | 104.1 (38.5) | 16.1 (23.2) | 73.4 (32.6) |
Upper limits are 40 and 160, respectively.