What we now call ADHD has gone by other terms in the past. In the third edition Diagnostic and Statistical Manual of Mental Disorders (DSM-III) from 1980-1987, it was termed Attention-Deficit Disorder (ADD) either with or without hyperactivity. In the next edition of the DSM, this term was updated to Attention-Deficit Hyperactivity Disorder, but the ADD moniker has stuck for many people. Since 1994, our terms have remained mostly the same – ADHD with a subtype depending on the type of symptoms present most for that person, predominantly inattentive subtype, predominantly hyperactive subtype and combined subtype.
So, while the condition has not changed, our description and definition of it have and will continue to update to reflect our understanding.
Individuals with ADHD struggle with sustaining attention, focusing on tasks, organizing activities, making careless mistakes due to a lack of attention to detail, restlessness, fidgeting, difficulty staying seated, excessive talking, impulsiveness in actions and an inability to wait their turn, among other symptoms.
Those with trouble functioning mostly due to problems with inattention would be diagnosed with ADHD, predominantly inattentive type, while those with trouble functioning mostly due to hyperactive and impulsive symptoms would be diagnosed with ADHD, predominantly hyperactive type. Those with trouble functioning due to both types of symptoms would be diagnosed with ADHD, combined type.