* Attention-Deficit Hyperactivity Disorder:ADHD;

data ritalin;



 group      drug      subject    activity

-----------------------------------------

 NORMAL    PLACEBO       1          50

 NORMAL    PLACEBO       2          45

 NORMAL    PLACEBO       3          55

 NORMAL    PLACEBO       4          52

 NORMAL    RITALIN       1          67

 NORMAL    RITALIN       2          60

 NORMAL    RITALIN       3          58

 NORMAL    RITALIN       4          65

 HYPER     PLACEBO       1          70

 HYPER     PLACEBO       2          72

 HYPER     PLACEBO       3          68

 HYPER     PLACEBO       4          75

 HYPER     RITALIN       1          51

 HYPER     RITALIN       2          57

 HYPER     RITALIN       3          48

 HYPER     RITALIN       4          55