The effect of the Feingold diet (elimination of artificial colors, flavors, or foods with natural salicylates to reduce hyperactivity) on the reading achievement scores, behavior, and impulsivity/reflectivity of 13 children (ages 6 to 12 years) was evaluated. Six months after the experimental group adopted the Feingold diet there were no significant differences between the experimental and control groups on the standardized reading tests or on any of the five factors of the Conners Teacher Rating Scale (a measure of classroom behavior). Results on the Matching Familiar Figures Test showed possible changes in the impulsivity/reflectivity dimension as a function of the diet. Eight mothers reported marked behavioral improvement, six of the Ss followed the diet for at least 5 months, but seven mothers claimed the diet was too difficult to implement and had discontinued it after 1 or 2 months. (DB)