Comparison samples general table
| Publication | Definition | Sample size | Age in years (SD) | Males (%) | Right handed (%) | Years of education (SD) |
| Boddaert 200... | Healthy individuals | 12 | 10.80 (2.70) | 7 (58%) | N/A | N/A |
| Bonilha 2008... | Healthy individuals | 16 | 13.20 (5.00) | 16 (100%) | N/A | N/A |
| Craig 2007... | Healthy individuals | 19 | 35.00 (14.00) | 0 (0%) | 19 (100%) | N/A |
| Ecker 2010... | Healthy individuals | 22 | 28.00 (7.00) | 22 (100%) | 22 (100%) | N/A |
| Hyde 2009... | Healthy individuals | 15 | 19.20 (5.00) | 15 (100%) | 15 (100%) | N/A |
| Ke 2008... | Healthy individuals | 15 | 9.73 (1.67) | 12 (80%) | N/A | N/A |
| Ke 2009... | Healthy individuals | 10 | 9.40 (2.07) | 10 (100%) | 10 (100%) | N/A |
| McAlonan 200... | Healthy individuals | 24 | 33.00 (7.00) | 22 (92%) | 23 (96%) | N/A |
| McAlonan 200... | Healthy individuals | 55 | 10.67 (2.74) | 47 (85%) | 55 (100%) | N/A |
| Toal 2009... | Healthy individuals | 33 | 32.00 (9.00) | 30 (91%) | N/A | N/A |
| Waiter 2005... | Healthy individuals | 16 | 15.50 (1.60) | 16 (100%) | 16 (100%) | N/A |