Appendix C

The content in this publication was current at the time it was published, but it is not being updated. The publication is provided for historical purposes only.

Table 19. Supplementation and Various Outcomes

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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