What is ADHD?
 ADHD falls into three different categories: inattention, hyperactivity, and impulsivity.
                 Inattention
- This has six basic characteristics for diagnosis.
- They include not finishing jobs, not paying attention, not following directions, being distracted very easily,
    not listening, and making careless mistakes.
                 Hyperactivity-Impulsivity
- Usually, hyperactivity and impulsivity are combined together with five basic characteristics for diagnosis.
- They include overactive talking, disturbing others by interrupting, fidgeting, having trouble to wait their turn, and
    walking around at the wrong times.
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