Attention Deficit Hyperactivity Disorder (ADHD) is one of the most frequently diagnosed behavioural disorders in childhood that requires treatment (35% of children). It is an important health problem because it impairs social, educational and occupational performance, and increases the risk of other psychiatric disorders including anxiety, depression and substance misuse. There is no cure for ADHD and standard stimulant medication treatment is at best symptomatic. Moreover, stimulants have side effects and parents are often concerned over the longterm effects. A number of non-drug treatments have been developed however few of these target the brain directly. Neurofeedback Training (NTx) is a novel, non-drug treatment that targets the brain directly and that can potentially enhance the control of attention in ADHD. NTx could be a valuable alternative and/or adjunct to standard care. This study will establish the feasibility of near infrared spectroscopy neurofeedback training in ADHD for a future randomised controlled trial.