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Neuropsychological tests with statistically significant differences
| Test | Study | Result (P) | Treatment favoured |
| Benton visual retention test, form F | Dodrill 1997 | 0.049 | Placebo |
| Benton visual retention test, form G | Dodrill 1997 | 0.051 | Placebo |
| Symbol digit modalities test | Dodrill 1997 | 0.051 | Placebo |
