The Adult ADHD Self-Report Scale (ASRS v1.1) is an 18-item self-assessment tool tailored for evaluating Attention Deficit Hyperactivity Disorder (ADHD) symptoms in adults aged 18 and over. Developed in alignment with the World Health Organization Composite International Diagnostic Interview (2001) and DSM criteria, this scale features rephrased questions to accurately capture ADHD symptomatology in adults. It serves as a valuable screening instrument for diagnosing ADHD in adults, although it is recommended to use it alongside a clinical interview for a comprehensive assessment.