Psychology Today | 11.04.2026 23:10
ADHD is characterized by a list of 18 symptoms equally divided between the Inattentive and Hyperactive/Impulsive groupings. They yield different presentations: Predominantly Inattentive, Predominantly Hyperactive/Impulsive, or Combined. They used to be called subtypes, but there is so much variability in how ADHD presents across individuals that the groupings have been recognized to be extremely heterogeneous.
