| Exposed (%) | Nonexposed (%) | p | |
| Task of simple reaction | |||
| Average | 23.8 | 17.2 | 0.03 |
| Standard deviation | 16.52 | 13.48 | |
| Task of absolute subscripting | |||
| Average | 26.28 | 16.46 | 10-3 |
| Standard deviation | 16.38 | 11.03 | |
| Location task | |||
| Average | 15.12 | 10.74 | 0.04 |
| Standard deviation | 12.19 | 8.68 |