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The effect of a computerized morpheme-based training procedure on the reading and writing skills of reading-disabled participants (N = 30, mean age = 11.23 years, SD = 0.935) was examined. Considering that fast morphological analysis has been found to have a central role in written word processing of skilled readers, the following training was designed to enhance this process: it consisted of a visual lexical-decision task in which morphologically complex words were visually presented while the duration of the word-stems’ presentation was gradually restricted. A control intervention consisted of the same task, except that the duration of a nonmorphological unit’s presentation was manipulated. The children were divided into two groups: one underwent the morpheme-based intervention, and the other underwent the control intervention. The morpheme-based training procedure had a positive effect beyond that of the control procedure on the spelling of untrained word stems embedded in trained prefixes and suffixes. These results suggest a general improvement in retrieval of orthographic–morphological representations in spelling. Improvements in other measures could, however, not be ascribed to the morphological manipulation alone. These results emphasize the link between morphological processing and spelling. However, the morpheme-based training procedure appears to be less relevant to the improvement of reading.
