Attention deficit disorder (ADD): (ADD) 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). Also referred to as attention deficit-hyperactivity disorder (ADHD). ADD or ADHD is not caused by an underlying physical or mental disorder.
Reviewed on 12/4/2018
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