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Which symptoms are commonly associated with attention-deficit/hyperactivity disorder (ADHD)?

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Attention-deficit/hyperactivity disorder (ADHD) is a developmental disorder characterized by persistent symptoms that interfere with daily functioning and development. While there is no single definitive diagnostic test, clinicians categorize the disorder into three subtypes: predominantly hyperactive-impulsive, predominantly inattentive, and a combined type.12

Common symptoms associated with ADHD include:

Inattention: Distractibility, forgetfulness, disorganization, and difficulty sustaining attention during work, play, or conversation.12
Hyperactivity and Impulsivity: Fidgeting, restlessness, impatience, and speaking out of turn.12
Task Management: Difficulty following instructions and completing tasks.1

For a diagnosis, these traits must be present to a degree that is considered maladaptive and must cause impairment in at least two settings, such as at home, school, or work. Additionally, symptoms typically must be present by the age of 12. It is important to note that the learning difficulties associated with ADHD are not indicative of deficient intelligence.12