Children who are diagnosed with attention deficit hyperactivity disorder (or who engage in behavior consistent with such a diagnosis) are often prescribed stimulant medications for hyperactive or inattentive behaviors. However, the mechanisms by which stimulant medications affect individuals' behavior are rarely evaluated. The purpose of the…

We used an assessment that involved competing reinforcer dimensions in a concurrent-schedules arrangement to examine the effects of stimulant medication on impulsivity (i.e., sensitivity of choices to reinforcer immediacy relative to rate, quality, and effort) with 4 students with attention deficit hyperactivity disorder. The assessments were…

A study examined the effects of a behavioral intervention and methylphenidate on inappropriate behavior and sleep disturbance displayed by a 6-year-old boy who had been diagnosed with attention deficit hyperactivity disorder. Results showed the behavior intervention was effective in reducing inappropriate behaviors regardless of the presence or…

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…

Two case studies examined the utility of curriculum-based measurement of math and reading for evaluating the effects of methylphenidate on the academic performance of two students diagnosed with attention deficit hyperactivity disorder. Results suggest that the curriculum-based measures were sensitive indicators of the students' responses to the…

To assess the drug-behavior interaction effects with an 8-year-old boy with attention deficit hyperactivity disorder, classroom antecedent and consequent stimuli were alternated within a school day, while drug conditions were alternated across days. Results indicate that peer attention maintained disruptive behavior when methylphenidate was…

Double-blind placebo-controlled procedures examined whether 6 children with attention deficit hyperactivity disorder could recognize medication effects. Three children were able to accurately report their medication status at levels greater than chance. Accuracy of reports was related to dosage level, differences in behaviors, and the presence of…