If you've been researching attention disorders, you've likely encountered both "ADD" and "ADHD" and wondered what the difference is. The short answer: ADD is an outdated term that is now officially classified as a subtype of ADHD. But the longer answer involves some important nuances that affect how people understand and communicate about these conditions.
The History of ADD and ADHD
The term ADD (Attention Deficit Disorder) was introduced in the DSM-III in 1980. It was used to describe a condition characterized primarily by inattention, with or without hyperactivity. In 1987, the DSM-III-R replaced ADD with ADHD (Attention Deficit Hyperactivity Disorder), emphasizing the hyperactive component of the disorder.
The current DSM-5 uses ADHD as the umbrella term and recognizes three presentations:
- ADHD, Predominantly Inattentive Presentation — what was formerly called ADD
- ADHD, Predominantly Hyperactive-Impulsive Presentation
- ADHD, Combined Presentation
Why People Still Use "ADD"
Despite the official terminology change, many people — including clinicians, educators, and patients — continue to use "ADD" to describe the inattentive presentation of ADHD. This is partly because the term "ADHD" implies hyperactivity, which is not present in the inattentive subtype. Many adults with the inattentive presentation feel that "ADD" better describes their experience.
Key Differences in Presentation
While ADD (inattentive ADHD) and hyperactive-impulsive ADHD are both presentations of the same underlying disorder, they look quite different:
- ADD (Inattentive): Daydreaming, difficulty focusing, forgetfulness, disorganization, losing things, appearing "spacey." Often goes undiagnosed, particularly in girls and women.
- Hyperactive-Impulsive ADHD: Fidgeting, talking excessively, difficulty waiting, acting without thinking, interrupting others. More visible and more commonly diagnosed in children.
- Combined ADHD: Meets criteria for both inattentive and hyperactive-impulsive presentations.
Does the Label Matter?
For practical purposes, the specific label matters less than getting an accurate diagnosis and appropriate treatment. Both ADD and ADHD respond to similar treatments — stimulant medications, behavioral therapy, and lifestyle modifications. The key is working with a qualified clinician to understand your specific presentation and develop a personalized treatment plan.
See also: What is ADD? and ADD Symptoms.