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ADHD Testing Adults While online ratings scales and symptom checklists can help a person determine if their symptoms could be ADHD, the best way to determine if they are suffering from ADHD is through a professional. This can be done by consulting and assessing with an therapist. The examiner will ask questions regarding the person's development beginning in the early years of childhood, their academic and work histories, drug and alcohol use as well as family and social life. Interviews wi