Ben Feingold first suggested that artificial food colors and other additives caused overactive, impulsive and inattentive behavior in children; this sort of hyperactivity is known to be a marker for later educational difficulties, especially problems with reading, and antisocial behavior. (C.M.et al 1993).
In a study, children whose mothers felt they were sugar-sensitive were given aspartame as a substitute for sugar. Half the mothers were told their children were given sugar, half that their children were given aspartame. The mothers who thought their children had received sugar rated them as more hyperactive than the other children and were more critical of their behavior. (Hoover DW 1994)