Although a vast literature has indicated that stimulant medications are effective for reducing inappropriate behavior in children with attention deficit hyperactivity disorder (ADHD), the effects of stimulant medication on ancillary behaviors (e.g., play) have yet to be investigated with the same rigor. We used a reinforcer assessment procedure to…

A study examined sensitivity to reinforcement in two boys (ages 7-10) with attention deficit hyperactivity using the matching law and evaluated effects of methylphenidate. In the medicated condition, the matching function for both subjects resulted in higher asymptotic values, indicating an overall elevation of behavior rate under these…

A study conducted reinforcer assessments for three boys (ages 7-9) with attention deficit hyperactivity disorder who alternately received either a placebo or methylphenidate. Methylphenidate altered the relative reinforcing effectiveness of various stimuli that are often used in classroom-based behavioral treatment programs, particularly coupons…

Individualized assessments of the effects of three dosages of methylphenidate were conducted for two students (ages 10-11) with attention deficit hyperactivity disorder within each child's classroom using behavioral, academic, and social measures. At least one or more dosages were associated with improvement for both children in each area.…