Comparison samples general table
| Publication | Definition | Sample size | Age in years (SD) | Males (%) | Right handed (%) | Years of education (SD) |
| Carmona 2007... | Healthy individuals | 18 | 13.03 (3.04) | 13 (72%) | 15 (83%) | N/A |
| Christian 20... | Healthy individuals | 21 | 38.90 (9.80) | 15 (71%) | 16 (76%) | 14.90 (1.90) |
| Gilbert 2008... | Healthy individuals | 20 | 29.80 (7.86) | 9 (45%) | N/A | N/A |
| Gilbert 2008... | Healthy individuals | 10 | 13.40 (2.60) | 6 (60%) | 10 (100%) | N/A |
| Kim 2001... | Healthy individuals | 25 | 27.00 (6.20) | 17 (68%) | 24 (96%) | 15.30 (1.80) |
| Pujol 2004... | Healthy individuals | 72 | 30.10 (10.20) | 40 (56%) | 61 (85%) | 14.00 (3.10) |
| Riffkin 2005... | Healthy individuals | 18 | 34.55 (11.82) | 8 (44%) | 17 (94%) | 13.40 (2.64) |
| Soriano-Mas ... | Healthy individuals (2nd sample) | 30 | 31.80 (10.20) | 16 (53%) | 27 (90%) | 13.10 (3.20) |
| Szeszko 2008... | Healthy individuals | 26 | 13.00 (2.60) | 9 (35%) | 17 (65%) | N/A |
| Valente 2005... | Healthy individuals | 15 | 32.30 (11.80) | 7 (47%) | 11 (73%) | 10.40 (2.21) |
| van den Heuv... | Healthy individuals | 50 | 31.40 (7.64) | 20 (40%) | 45 (90%) | N/A |
| Yoo 2008... | Healthy individuals | 71 | 26.68 (6.09) | 47 (66%) | 71 (100%) | N/A |