Stimulant medication is the most common treatment for ADD/ADHD, but about 60-65% of cases persist into adulthood. Short-acting stimulants have the highest abuse potential, with 46% of adults with ADHD using them and nearly 80% of patients abusing them. There is interest in alternative treatments due to concerns about side effects and stigma of behavioral therapy. Recent research has investigated brain training games to improve cognition, with some studies finding they can enhance memory, attention, and executive functions in both young and old. The proposed study will examine whether brain training games targeted at improving attention are effective for adults with ADD/ADHD by comparing pre- and post-training Stroop test attention scores between those