Table 3.

Modafinil does not significantly alter performance of the WCST.

Measure	Mean (SEM)	F	p-value
Total Correct		0.73	0.49
Placebo	48.3 (1.8)
200 mg Modafinil	45.4 (3.1)
400 mg Modafinil	46.6 (3.3)
Total Errors		0.75	0.48
Placebo	15.6 (1.8)
200 mg Modafinil	18.6 (3.1)
400 mg Modafinil	17.4 (3.3)
% Perseverative Responses		0.91	0.41
Placebo	37.4 (1.8)
200 mg Modafinil	28.3 (8.8)
400 mg Modafinil	44.6 (3.6)
% Perseverative Errors		1.04	0.36
Placebo	35.2 (4.6)
200 mg Modafinil	27.9 (7.8)
400 mg Modafinil	45.1 (8.4)
% Nonperseverative Errors		0.09	0.91
Placebo	50.6 (5.2)
200 mg Modafinil	50.4 (8.8)
400 mg Modafinil	54.3 (9.4)
Categories Completed		0.24	0.79
Placebo	3.5 (0.3)
200 mg Modafinil	3.3 (0.4)
400 mg Modafinil	3.6 (0.5)
Trials to Complete 1st Category		1.95	0.15
Placebo	14.2 (2.3)
200 mg Modafinil	19.5 (3.8)
400 mg Modafinil	21.3(4.1)