The primary symptoms of the condition are hyperactivity, impulsivity and inattention.

这种病症的主要症状就是过度活跃，易冲动以及注意力不集中。

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BACKGROUND: Abnormality exists in the process of the strengthening mechanism of attention deficit hyperactivity disorder, and impulsivity is the main manifestation of abnormal strengthening mechanism.

背景：注意缺陷多动障碍存在着强化机制的异常，而冲动性是强化机制异常的主要表现。

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OBJECTIVE: to probe into the change of impulsivity of animal model (spontaneously hypertensive rat, SHR) of attention deficit hyperactivity disorder.

目的：探究注意缺陷多动障碍动物模型(自发高血压大鼠)冲动性的变化。

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Results suggested that after three months, the group using the fatty acid made "highly significant improvements" in 12 out of 13 behavioural scales, including three diagnostic ADHD features - inattention, hyperactivity and impulsivity.

BBC: NEWS | UK | England | Oil pills boost pupil brain power