But it can affect learning. Our subject is attention deficit disorder ADD and the related form ADHD attention deficit hyperactivity disorder.

我们这次的主题是注意缺陷症ADD，以及与此相关的ADHD，即注意力缺陷过动症。

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A new study finds that the rise in attention deficit hyperactivity disorder, or ADHD, is not a uniquely American phenomenon.

一项新的研究发现，注意力缺陷多动障碍、或称adhd病例的增加，并不是美国独有的现象。

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She said there was evidence linking TV viewing with Attention Deficit Hyperactivity Disorder (ADHD) while extensive texting was associated with lower IQ scores.

她说，有证据显示看电视和注意缺陷多动障碍（ADHD）有关，而广泛的短信是智商较低有关。

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"My son has ADHD (attention deficit hyperactivity disorder) and I have a letter from his school saying that the move will be detrimental to him, " she said.

BBC: Connaught House

Mental health issues, from depression to anxiety to ADHD (Attention Deficit Hyperactivity Disorder), affect almost 58 million adults in the U.S. That means that just over 26% of Americans ages 18 and older (the demographic that makes up the American workforce) suffer from a diagnosable mental disorder.

FORBES: Workplace Mental Health: It Pays To Be Proactive

It is believed that sleep deprivation may harm neurological development and can contribute to behavioural problems including attention deficit hyperactivity disorder (ADHD).

BBC: Children losing out on sleep