Figure 3

Comparison between placebo and methylphenidate main effects for factor block. (A) Main effect for factor block observed through mean and SD only into placebo. *Significant difference (Scheffé test; p < 0.05). **Significant difference (Scheffé test; p < 0.035). (B) Main effect for factor block observed through mean and SD only into methylphenidate. *Significant difference (Scheffé test; p < 0.003). **Significant difference (Scheffé test; p < 0.001). ***Significant difference (Scheffé test; p < 0.011).