Attention Deficit (ADD) and Attention Deficit Hyperactivity Disorder (ADHD) Clinic for Children and Adults Attention deficit disorder is among the most common sources of academic and professional failure in children and adults. Left undiagnosed and untreated, ADD and ADHD prevent the individual from attaining his/her peak performance level. Precise diagnosis is the key to a successful treatment of ADD and ADHD. We offer comprehensive neuropsychological assessment and individualized cognitive training programs for ADD and ADHD in children and adults.