When the revised, fourth edition of the DSM was published in 1994, ADHD was divided into specific subtypes, taking into account the fact that an individual could be diagnosed with ADHD without having symptoms of hyperactivity, according to research published in the journal ADHD Attention Deficit and Hyperactivity Disorders. The condition was commonly referred to as ADD until 1987, when “hyperactivity” was added to the name in the third edition of the DSM. While some people still use the terms ADD and ADHD interchangeably, and may call the condition ADD if a child only has trouble focusing and isn't hyperactive, ADHD is officially recognized as the correct term for this condition by the current version of the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders (DSM). Attention deficit disorder (ADD) is an older term for what's now known as ADHD.
