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Methylphenidate and attentional training. Comparative effects on behavior and neurocognitive performance in twin
1Department of Psychology, University of Hawaii, Honolulu 96822, USA. largo@unuhix.uhcc.hawaii.edu
Abstract:
The effectiveness of four doses (5-mg, 10-mg, 15-mg, 20-mg) of methylphenidate (MPH) and attentional training (AT) were evaluated using neurocognitive instruments (Continuous Performance Test; Matching Unfamiliar Figures Test), narrow- and broad-band rating scales in the context of a double-blind, placebo-control, within-subject reversal design for dizygotic twin girls with Attention-Deficit/Hyperactivity Disorder (ADHD). Both interventions proved effective for improving neurocognitive test performance and behavior, although broad-band ratings revealed dose-response curves different from those obtained from the neurocognitive tests. Implications for clinical management of girls with ADHD are discussed.