Abstract: Attention deficit/hyperactivity disorder (ADHD) is often considered to be a disorder in children and adolescents, but is in fact diagnosed in 2.5% of adults. A main behavioral correlate of ADHD is heightened levels of distractibility by external irrelevant stimuli, causing difficulties staying focused on the current task. We conducted a visual search training regimen over five daily sessions with participants diagnosed with ADHD and healthy controls. In the task, irrelevant color singleton distractors appeared during self-timed visual search on 50% of trials. Participants completed transfer tasks before and after training and at a follow-up session one month later. In this talk I will discuss: the findings from an initial behavioral study establishing differences in distraction between control and ADHD participants; the current preliminary findings from the training study; and a proposal for an upcoming study to investigate the neural and behavioral correlates of tDCS and visual attention training.