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ERIC Number: EJ1166284
Record Type: Journal
Publication Date: 2017-Dec
Pages: 11
Abstractor: As Provided
ISSN: ISSN-1092-4388
Tracking the Growth of Tense and Agreement in Children with Specific Language Impairment: Differences between Measures of Accuracy, Diversity, and Productivity
Leonard, Laurence B.; Haebig, Eileen; Deevy, Patricia; Brown, Barbara
Journal of Speech, Language, and Hearing Research, v60 n12 p3590-3600 Dec 2017
Purpose: Composite measures of children's use of tense and agreement morphology differ in their emphasis on accuracy, diversity, or productivity, yet little is known about how these different measures change over time. An understanding of these differences is especially important for the study of children with specific language impairment, given these children's extraordinary difficulty with this aspect of grammar. Method: We computed 3 types of composite scores from spontaneous speech samples obtained from 17 preschoolers with specific language impairment before, during, and after their participation in a language intervention study. These measures were the Finite Verb Morphology Composite (a measure of accuracy), the Tense Marker Total (a measure of diversity), and the Productivity Score (a measure of productivity). Results: The 3 measures differed in their growth trajectories. Sample size did not alter the linear or quadratic nature of growth of any composite, although it did affect the absolute values found for the Tense Marker Total and Productivity Score. Conclusion: Even when sample size is controlled, early growth can be seen in tense and agreement accuracy with relatively limited diversity and productivity, whereas later growth in diversity and productivity can occur with very little change in accuracy.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: National Institute on Deafness and Other Communication Disorders (NIDCD)
Authoring Institution: N/A
Grant or Contract Numbers: R01DC04544