What is the difference between ADD and ADHD?
The diagnosis is formally known as ADHD. ADD refers to a condition where a person lacks noticeable hyperactivity-related symptoms (Attention Deficit Disorder, inattentive subtype). However, the terms ADD and ADHD can be used synonymously, and frequently, people will just refer to someone as having ADHD even if they don’t have the hyperactivity component.
Both ADHD and ADD are referred to as ADHD in this article.