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The Diagnostic and Statistical Manual (DSM-IV) divides the symptoms of ADHD into those of inattentiveness and those of hyperactivity/impulsivity.
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To be diagnosed with ADHD, children should have at least 6 attention symptoms or 6 activity/impulsivity symptoms -- to a degree beyond what would be expected for children their age.
The symptoms must be present for at least 6 months, observable in 2 or more settings, and not caused by another problem. The symptoms must be severe enough to cause significant difficulties. Some symptoms must be present before age 7.
Older children who still have symptoms, but no longer meet the full definition, have ADHD in partial remission.
Some children with ADHD primarily have the Inattentive Type, some the Hyperactive-Impulsive Type, and some the Combined Type. Those with the Inattentive type are less disruptive and are easier to miss being diagnosed with ADHD.
Inattention symptoms:
- Fails to give close attention to details or makes careless mistakes in schoolwork
- Difficulty sustaining attention in tasks or play
- Does not seem to listen when spoken to directly
- Does not follow through on instructions and fails to finish schoolwork, chores, or duties in the workplace
- Difficulty organizing tasks and activities
- Avoids or dislikes tasks that require sustained mental effort (such as schoolwork)
- Often loses toys, assignments, pencils, books, or tools needed for tasks or activities
- Easily distracted
- Often forgetful in daily activities
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