Differences between ADD and ADHD

Attention deficit disorder vs. Attention deficit hyperactivity disorder

Attention deficit disorder (ADD) and attention deficit hyperactivity disorder (ADHD) are terms used to describe a neurodevelopmental condition characterized by persistent patterns of inattention, hyperactivity, and impulsivity. While the term "ADD" remains common in colloquial speech, it is no longer a formal medical diagnosis in the *Diagnostic and Statistical Manual of Mental Disorders* (DSM). The American Psychiatric Association (APA) transitioned to using "ADHD" as the primary umbrella term in 1987, regardless of whether a patient exhibits physical hyperactivity.

Comparison Table

Feature	Attention Deficit Disorder (ADD)	Attention Deficit Hyperactivity Disorder (ADHD)
Current Clinical Status	Outdated; no longer used in the DSM.	Current official medical diagnosis.
Primary Symptoms	Inattention, distractibility, and poor working memory.	Inattention, hyperactivity, and impulsivity.
DSM Classification	DSM-III (1980).	DSM-III-R (1987) to DSM-5-TR (present).
Physical Activity	Primarily sluggish or "daydreaming" behavior.	Often involves fidgeting or inability to remain still.
Modern Equivalent	ADHD, Predominantly Inattentive Presentation.	ADHD (encompassing all presentations).
Gender Trends	Frequently diagnosed in girls and adults.	Historically diagnosed more often in boys.
Impulsivity	Lower levels of behavioral impulsivity.	Higher levels of verbal or physical impulsivity.

Venn diagram comparing Differences between ADD and ADHD

Historical context and clinical evolution

The medical understanding of attention-related disorders has changed significantly since the early 20th century. In 1902, pediatrician George Still described children with "defective moral control" who lacked the ability to sustain attention. The 1968 version of the DSM (DSM-II) used the term "hyperkinetic reaction of childhood."

The 1980 publication of the DSM-III introduced "attention deficit disorder" (ADD) as a formal diagnosis. This manual recognized two versions: ADD with hyperactivity and ADD without hyperactivity. This was a shift in focus from purely physical behavior to the cognitive aspects of concentration. In 1987, the DSM-III-R renamed the condition to "attention-deficit hyperactivity disorder" (ADHD). This change combined the symptoms into a single diagnosis rather than maintaining ADD as a separate entity.

Contemporary classification

Under the current DSM-5-TR, healthcare providers diagnose patients with ADHD and specify the "presentation" based on the symptoms observed over the previous six months. What was formerly called ADD is now classified as ADHD, Predominantly Inattentive Presentation.

The three current presentations are:

• Predominantly Inattentive: The individual has difficulty organizing tasks, following instructions, or maintaining focus but does not show significant signs of hyperactivity.
• Predominantly Hyperactive-Impulsive: The individual shows symptoms of restlessness, excessive talking, and impulsivity but may be able to maintain focus on tasks.
• Combined: The individual meets the criteria for both inattentive and hyperactive-impulsive symptoms.

Studies conducted by the Centers for Disease Control and Prevention (CDC) indicate that the prevalence of the inattentive presentation is increasing as diagnostic criteria become more sensitive to symptoms that do not involve outward disruption. Diagnosis typically requires a comprehensive evaluation, including clinical interviews and behavior rating scales provided by parents, teachers, or partners.