Director Michael McNamara decided to make a documentary about attention deficit hyperactivity disorder (ADHD) in adults after learning that a friend and colleague was diagnosed with it at the age of 56. His friend’s diagnosis had upended McNamara’s assumptions about the disorder, which is most commonly diagnosed in school-aged children. Until then, he didn’t know it could affect individuals into adulthood. But as he began researching and conducting interviews for the film, McNamara found the main symptoms, including inattentiveness, procrastination and impulsiveness, seemed all too familiar.