Making a diagnosis of ADHD requires the collaboration of specialists. It usually involves several meetings. To be diagnosed with attention deficit hyperactivity disorder, symptoms of the disorder should:

  • persist for at least 6 months;
  • have a negative impact on functioning;
  • be noticeable in many situations or places;
  • differ significantly from developmental levels;
  • occur before the patient is 12 years old;
  • not be caused /better explained by another problem.

Source / Bibilography