Signs & symptoms:Inattention, hyperactivity and impulsivity are the key behaviors of ADHD. To be diagnosed with the disorder, a child must have symptoms for six or more months and to a degree that is greater than other children of the same age. Children who have symptoms of inattentive may:• Be easily distracted, miss details, forget things and frequently switch from one activity to another.• Become bored with a task after only a few minutes, unless they are doing something enjoyable.• Have difficulty focusing attention on completing a task or learning something new.• Not seem to listen when spoken to.