Sugar, food additives and other dietary elements. These are not involved in most ADD cases. Though more ADD children seem to have them, allergies are co-existing conditions, not causes. ADD behaviors are not usually the result of neglect or poor discipline. These children tend to behave unacceptably because they are difficult to discipline by even the best of parents.
ADD is a group of behaviors presenting itself differently in each child.
All ADD children have difficulty paying attention, focusing, and staying on task . The difficulty may vary situationally. It is most noticeable in academic settings that require listening in class and completing written work. Can't stick with school assignments. There is no single test, either medical, neurological, or psychological.