Production of grammatical morphemes was examined in free speech samples from 34 4-year-olds with history of slow expressive language development (SELD) and control group. Both the SELD children who had caught up in mean length of utterance by age four and those who had not had acquired fewer grammatical morphemes than controls, though acquisition…

Twenty-five preschool children with specific language impairment and 25 controls were evaluated on generalization of trained bound morphemes to untrained vocabulary stems, in 2 training conditions: explicit, trainer verbalization of the affixation "rule" and an "implicit rule" condition. Findings indicated that explicit presentation of…

The study found differential learning rates in a group of bilingual children (ages four to six) with limited English proficiency (LEP) when they all were taught an invented morpheme. The language-impaired children in the group learned the morpheme at a slower rate than the nonimpaired children. Results have implications for identifying language…

This study compared the relative effectiveness of imitative intervention and conversational recast language intervention applied to grammatical morpheme and complex sentences in 21 children with specific language impairment. The conversational procedure was found to require fewer presentations to first spontaneous use and to produce more…