Spending 25 minutes a day with a video game-like intervention improved symptoms among adolescents with attention deficit-hyperactivity disorder (ADHD), a randomized control trial found. Among 348 adolescents, those assigned to the intervention...had small but significant improvements in Test of Variables of Attention-Attention Performance Index (TOVA-API) scores at 4 weeks... reported Scott Kollins, PhD, of Duke University in Durham, North Carolina, and colleagues.