The Barkley Adult ADHD Rating Scale-IV (BAARS-IV) is a trusted self-report questionnaire that screens for Attention Deficit Hyperactivity Disorder (ADHD) symptoms in adults. This 27-item assessment, created by Dr. Russell A. Barkley, aligns with the DSM-IV criteria for ADHD. By gauging the frequency of symptoms across Inattention, Hyperactivity/Impulsivity, and Sluggish Cognitive Tempo domains, the BAARS-IV offers valuable insights into the presence and severity of adult ADHD. However, it's crucial to note that this tool is one piece of data and not a substitute for a professional diagnosis.