Attention Deficit Hyperactivity Disorder (ADHD) is one of the most common psychological problems in children and its symptoms include impulsiveness, hyperactivity, inattention and constant daydreaming. It has also been associated with problems with coordination and a study of 268 children by researchers at the Johns Hopkins University School of Medicine in Baltimore, U.S. compared motor skills in children with and without the condition. The children who were between the ages of seven and fifteen, were tested on how fast and how well they could tap their toes, walk on their heels, maintain balance and keep a steady rhythym during a task. The girls with ADHD and the group without the condition had much better scores than the boys with ADHD. This may be because girls' brains mature more quickly than boys'.
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