| Abstract | Discusses language-related problems in children with reading disorder in relation to proposals about the language-processing mechanism. Hypotheses about the causes of reading disorder are then examined from the standpoint of an analysis of the demands of the reading task and a consideration of the state of the unsuccessful reader in meeting these demands. A hypothesis about the source of reading problems, in which the working memory system plays a central part, is discussed. This proposal is evaluated in light of empirical research that has attempted to separate structural knowledge and memory capacity both in normal children and in children with notable reading deficiencies. |