“…King concluded that allergens do provoke psychological symptoms. However, there is considerable debate over the validity of these findings because of a question as to whether the subjects were truly blind to the challenge substances (Bell, 1987;Egger, 1988;Pearson & Rix, 1987). Brown, Gibney, Husband, and Radcliffe (1981) did a double blind challenge of 12 patients who had claimed to have benefited from diets in which foods to which they thought they were allergic had been excluded.…”