a within-subject comparison was made of the effects of methylphenidate ( ritalin ) and response cost in reducing the off-task behavior of two boys , 7 and 8 years of age , who had been diagnosed as having an attentional deficit disorder with hyperactivity , several dosages of ritalin ( 5 to 20 mg/day ) were evaluated with the results indicating varying effects of the drug for both children .
C0025810
methylphenidate
C1263846
attentional deficit disorder with