Medical Definition of Attention Deficit Disorder (ADD)

Attention deficit disorder (ADD) is an old term for primarily inattentive ADHD (attention deficit hyperactivity disorder). ADHD is a developmental disorder characterized by symptoms of inattention (such as distractibility, disorganization, or forgetfulness) or by symptoms of hyperactivity and impulsivity (such as fidgeting, speaking out of turn, or restlessness). It is also referred to as attention deficit-hyperactivity disorder (ADHD). ADHD is not caused by an underlying physical or mental disorder.

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The abbreviated term ADHD denotes the condition commonly known as: See Answer