Abstract
This research reports findings in a 10-year study of an apraxic adult, who was one of five subjects described by Shankweiler and Harris, (
Cortex,
,2 277–292, 1966). Confusion matrices and feature analysis were used to compare 1965 and 1975 performances. Results indicate that over the 10-year period, errors of place, manner, and omission were markedly reduced. Voicing errors, however, while reduced in total number, still constituted a significant percentage of the patient's residual errors. Implications of these findings are discussed.