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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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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The irritability, excitability and impulsivity that mark the disorder often overlap with the signs of attention deficit hyperactivity disorder.

这种障碍显著的易怒、兴奋与冲动等特点通常与注意力缺陷多动障碍症状相交迭。

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Whichever term you use, the important point to know is that you can have ADHD (or ADD) without showing any signs of hyperactivity or impulsivity whatsoever.

NPR: Excerpt: 'Delivered from Distraction'

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