Abstract: On the basis of two typical case studies of different readingdisabilities caused by brain damage, this paper tries to maketwo inferences: 1. The reading process undergoes two different levels of informationporcessing: (1) The level of word recognition, i. e., of grasping theshape, phoneme and meaning of the words and the connections betweenthem; (2) the level of sentence comprehension, i. e., of syntactic analysisand semantic understanding. 2. The psychological activity at the sentence level plays a moreactive and effective dynamic role in the reading and understandingprocess.

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