Normal students (N=65) in fourth, sixth, and eighth grades were compared to 17 learning-disabled ninth graders on learning derivational morphology and spelling derived forms. Disabled students' knowledge of derivational morphology was equivalent to that of normal sixth graders, but spelling of derived forms was equivalent to that of fourth…

Two studies involving 215 subjects tested the hypothesis that orthographic coding bypasses phonological coding after the early stages of reading or spelling. It was found that nondyslexics continue to develop phonological coding skill until adulthood and rely on it for reading and spelling to a significantly greater extent than do dyslexics.…