“We found teens with ADHD to have two to three times more difficulties with sleep problems,” stated Stephen Becker, a Clinical Psychologist at Cincinnati Children’s Hospital Medical Center. Becker and his colleagues conducted a study in which they recruited 300 students, half with ADHD, half without. Twenty percent of the teens with ADHD got less than seven hours of sleep on school nights, compared to 10 percent of students without ADHD.