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van Wouwe, N. C.; Ridderinkhof, K. R.; Band, G. P. H.; van den Wildenberg, W. P. M.; Wylie, S. A. – Neuropsychologia, 2012
Learning to select optimal behavior in new and uncertain situations is a crucial aspect of living and requires the ability to quickly associate stimuli with actions that lead to rewarding outcomes. Mathematical models of reinforcement-based learning to select rewarding actions distinguish between (1) the formation of stimulus-action-reward…
Descriptors: Mathematical Models, Diseases, Patients, Rewards
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Johnson, Katherine A.; Barry, Edwina; Bellgrove, Mark A.; Cox, Marie; Kelly, Simon P.; Daibhis, Aoife; Daly, Michael; Keavey, Michelle; Watchorn, Amy; Fitzgerald, Michael; McNicholas, Fiona; Kirley, Aiveen; Robertson, Ian H.; Gill, Michael – Neuropsychologia, 2008
Increased variability in reaction time (RT) has been proposed as a cardinal feature of attention deficit hyperactivity disorder (ADHD). Increased variability during sustained attention tasks may reflect inefficient fronto-striatal and fronto-parietal circuitry; activity within these circuits is modulated by the catecholamines. A disruption to…
Descriptors: Comparative Analysis, Stimulants, Drug Therapy, Reaction Time