Reports a study that examined sixth- and 10th-grade students' ability to generate orthographic and phonetic derivatives for three predominant vowel-alternation patterns characteristic of internal derivational morphology. Results support the hypothesis that a productive knowledge of these patterns in orthography precedes a productive knowledge of…

Comparison of normal-speaking (N=20) and misarticulating (N=20) four- to six-year-olds and adults (N=16) revealed that adults were significantly more accurate in detecting mispronunciations than either group of children, while performance between the two groups of children was similar. Words that children found most difficult were also those on…