Table 3.

Results of the dependent t-test of attention and impulsivity variables

Variables	Group	Mean in pre-test	Mean in post-test	t statistic	P-value
Visual attention	Methylphenidate	77.96	92.84	-2.85	0.009
	Modafinil	86.52	98.28	-2.88	0.008
Auditory attention	Methylphenidate	73.72	91.40	-2.75	0.011
	Modafinil	82.92	94.68	-2.56	0.014
Visual response control	Methylphenidate	84.92	101.92	-4.35	0.000
	Modafinil	91.44	105.64	-4.14	0.000
Auditory response control	Methylphenidate	75.88	98.88	-5.01	0.000
	Modafinil	81.92	99.40	-4.21	0.000