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| Score change | BrainPower intervention | Placebo control | Total | |||
|---|---|---|---|---|---|---|
| N | % | N | % | N | % | |
| −5 | 1 | 2.1 | 0 | 0 | 1 | 1 |
| −3 | 0 | 0 | 1 | 2 | 1 | 1 |
| −2 | 1 | 2.1 | 2 | 3.9 | 3 | 3.1 |
| −1 | 1 | 2.1 | 5 | 9.8 | 6 | 6.1 |
| 0 | 2 | 4.3 | 2 | 3.9 | 4 | 4.1 |
| +1 | 6 | 12.8 | 5 | 9.8 | 11 | 11.2 |
| +2 | 7 | 14.9 | 17 | 33.3 | 24 | 24.5 |
| +3 | 12 | 25.5 | 8 | 15.7 | 20 | 20.4 |
| +4 | 9 | 19.1 | 5 | 9.8 | 14 | 14.3 |
| +5 | 2 | 4.3 | 5 | 9.8 | 7 | 7.1 |
| +6 | 4 | 8.5 | 0 | 0 | 4 | 4.1 |
| +7 | 2 | 4.3 | 1 | 2 | 3 | 3.1 |
| Total | 47 | 100.0 | 51 | 100.0 | 98 | 100.0 |
