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What is the definition of hyperactivity? 


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Hyperactivity refers to a set of symptoms that can have various causes. These symptoms include inattentiveness, impulsivity, physical overactivity, excitability, and distractibility. Some experts believe that hyperactivity may have an organic basis, such as brain damage or neurological impairment, but there is limited data to support this view . Other possible causes of hyperactivity include developmental factors, psychological factors, and diet . Hyperactivity is often diagnosed in childhood, but the symptoms can also appear after age four or five . It is important to consider psychiatric, developmental, physical, neurological, psychosocial, and environmental factors when making a differential diagnosis of hyperactivity . Hyperactivity can have long-term consequences for children and their families, and it is associated with other psychiatric problems, such as antisocial personality, in late adolescence .

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The definition of hyperactivity is not provided in the given text.
Hyperactivity refers to a set of symptoms including inattentiveness, impulsivity, physical overactivity, excitability, and distractibility, which may have various causes.
Hyperactivity is a syndrome characterized by attentional difficulties and symptoms such as aggression, overactivity, and learning disabilities.
Hyperactivity is a common symptom in grade-school-age children and is characterized by excessive and uncontrolled levels of activity and impulsivity.
Hyperactivity is difficult to define operationally, but it is often characterized by problems with attentional processes and impulse control.

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