Validity of Parent Report Measures of Vocabulary Development for Children With Down Syndrome This study investigated the validity of a parent report measure of vocabulary development, the MacArthur Communicative Development Inventory: Words and Sentences (CDI), in children with and without developmental disabilities. Concurrent validity was examined by comparing results from the CDI and laboratory measures of vocabulary in 44 children with Down syndrome ... Research Article
Research Article  |   October 01, 1995
Validity of Parent Report Measures of Vocabulary Development for Children With Down Syndrome
 
Author Affiliations & Notes
  • Jon F. Miller
    Department of Communicative Disorders and Waisman Mental Retardation Research Center, University of Wisconsin-Madison
  • Allison L. Sedey
    Department of Communicative Disorders and Waisman Mental Retardation Research Center, University of Wisconsin-Madison
  • Giuliana Miolo
    Department of Communicative Disorders and Waisman Mental Retardation Research Center, University of Wisconsin-Madison
  • Contact author: J. F. Miller, Rm. 483, Waisman Center, University of Wisconsin-Madison, 1500 Highland Avenue, Madison, Wl 53705–2280, E-Mail: miller@waisman.wisc.edu
Article Information
Development / Special Populations / Genetic & Congenital Disorders / Research Issues, Methods & Evidence-Based Practice / Language / Research Articles
Research Article   |   October 01, 1995
Validity of Parent Report Measures of Vocabulary Development for Children With Down Syndrome
Journal of Speech, Language, and Hearing Research, October 1995, Vol. 38, 1037-1044. doi:10.1044/jshr.3805.1037
History: Received July 6, 1994 , Accepted January 31, 1995
 
Journal of Speech, Language, and Hearing Research, October 1995, Vol. 38, 1037-1044. doi:10.1044/jshr.3805.1037
History: Received July 6, 1994; Accepted January 31, 1995

This study investigated the validity of a parent report measure of vocabulary development, the MacArthur Communicative Development Inventory: Words and Sentences (CDI), in children with and without developmental disabilities. Concurrent validity was examined by comparing results from the CDI and laboratory measures of vocabulary in 44 children with Down syndrome and 46 typically developing children with mental ages from 12 to 27 months. Significant correlations between .70 and .82 were obtained. Predictive validity was examined by measuring the vocabulary of 20 children with Down syndrome and 23 typically developing children first at approximately 20 months mental age and later at a mental age of approximately 28 months. Significant correlations were obtained between the CDI at Time A and all but one of the vocabulary measures at Time B (r = .46 to .66). These results establish the validity of parent measures of vocabulary development for children with Down syndrome and confirm their validity for typically developing children.

Acknowledgments
We would like to express our thanks to the children and families who participated in our longitudinal research project. We also wish to acknowledge the contributions of Jamie Murray-Branch and Peggy Rosin for their help in testing the subjects and assisting with the data analysis, and a special thanks to Karen Koerber for her transcription and data analysis efforts. This research was supported by research grant HD22393, NIH, NICHD, to Jon Miller.
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