The biomotometer, an electronic device that simultaneously measures activity and provides auditory feedback to the subject, was used in combination with material reinforcers in two experiments attempting to modify activity level in two children (one hyperactive, one psychotic and hyperactive). (Author/SBH)

Results indicated that the intervention package--including instructions, feedback from an electronic device that measures motor activity, and contingent reinforcement--was successful in reducing activity in the classroom for 8 of the 11 emotionally disturbed Ss (ages 9 to 13 years). (Author/DLS)

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…