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| Outcome | N | R | R 2 | p |
|---|---|---|---|---|
| Executive Functions | 11 | 0.726 | 0.527 | 0.0075 |
Inhibition and flexibility |
8 | 0.777 | 0.605 | 0.0138 |
| Attention | 16 | 0.457 | 0.208 | 0.0652 |
| Other cognitive and motor skills | 7 | 0.203 | 0.041 | 0.6297 |
Note. N=number of effect sizes. A positive correlation indicates that supplementation with dopamine precursors is associated with better performance on these cognitive tasks.
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