The current project is proposed to be highly helpful to build the world’s first-ever objective tool to provide a solution to the problem of misdiagnosis of children with Attention Deficit Hyperactivity Disorder (ADHD) and its subtypes. It will help the web/app-based innovative and affordable tool to classify ADHD subtypes, which will tap cognitive-motivational mechanisms impaired explicitly in ADHD subtypes. Such a diagnostic system will provide the clinician with objective data based on the child’s actual performance and will allow for observation in a paradigm likely to elicit inattention and impulsiveness.