Table 2.

Means, Standard Deviations, and Analysis of Variance Results for Point System Measures*

MeasurePlaceboRitalinAdderallRitalin versus Adderall Comparisons
10 mg17.5 mg7.5 mg12.5 mgDrugDoseDrug × Dose
Following rules50.5 (21.9)71.4 (16.2)74.5 (16.2)75.4 (11.8)79.9 (10.2)10.38§ 18.49# 0.46
Attention62.9 (14.9)64.0 (15.7)64.3 (15.4)68.2 (13.0)68.2 (13.1)5.47§ 0.000.01
Noncompliance13.8 (17.4)2.2 (3.7)0.8 (1.5)0.9 (1.6)1.2 (2.5)5.65§ 5.56§ 2.16
Interruption38.0 (43.5)10.6 (9.6)6.7 (6.6)6.2 (5.4)6.8 (6.9)7.48 15.33# 7.67
Complaining/whining17.1 (23.1)4.1 (5.6)2.6 (2.8)2.9 (3.4)2.0 (2.0)4.12 6.12§ 0.31
Positive peer behaviors8.2 (3.9)8.8 (5.5)8.8 (4.2)8.1 (4.0)7.8 (3.5)1.820.060.08
Conduct problems19.6 (41.8)1.4 (2.8)0.1 (0.3)0.4 (1.2)0.2 (0.5)5.17§ 3.91 4.54§
Negative verbalizations37.1 (57.0)6.1 (9.2)2.2 (3.0)2.0 (2.9)2.2 (0.1)7.89 5.15§ 6.10§
  • * All drug conditions were significantly different from placebo in an overall multivariate analysis of variance with the exception of the measures of attention and positive peer behaviors.

  • F(1, 24).

  • P < .10.

  • § P < .05.

  • P < .025.

  • P < .01.

  • # P < .001.