Description: core features: inattention, children with inattention do not stick to the task but skip rapidly from one activity to another, do not attend to what it said to them, are easily distracted, daydream, or lose things. Adhd are not generally at risk for bipolar disorder: anxiety, mood disorders. Epidemiology: prevalence of adhd in us school children has been estimated 3-7% (adhd-c most common in clinic studies, rates are usually higher with parents or teacher ratings of symptoms that meet a speci c criterion than clinically diagnosed adhd. Theories of adhd: theories have emphasized attention, arousal, response to reward, time perception, working memory, inhibition, executive functions, or self-regulation, arousal level, arousal refers to the alertness or the intensity or speed of reaction to stimuli. Assessment: assessment must be broad-based since the disorder is biopsychosocial, developmental history and assessment will vary depending one one s developmental level. Intervention: prevention, reasonable to assume that prenatal care can have some impact on preventing.