A new nationally representative study published online in the International Journal of Applied Positive Psychology found two in five adults (42%) with attention deficit hyperactivity disorder (ADHD) were in excellent mental health. To be considered in excellent mental health, participants had to report: freedom from mental illness in the previous year (i.e., substance use disorders, depression, anxiety, suicidality); almost daily happiness or life satisfaction in the past month; and high levels of social and psychological well-being in the past month.