Common food additives and colorings can increase hyperactive behavior in a broad range of children, a study being released today found. It was the first time researchers conclusively and scientifically confirmed a link that had long been suspected by many parents. Numerous support groups for attention deficit hyperactivity disorder have for years recommended removing such ingredients from diets, although experts have continued to debate the evidence. But the new, carefully controlled study shows that some artificial additives increase hyperactivity and decrease attention span in a wide range of children, not just those for whom overactivity has been diagnosed as a learning problem. For related information on effects of food additives, visit: http://www.nytimes.com http://www.healthwatchcenter.com/category/mental-disorders/ Louie,