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Predictive validity of the New Zealand MacArthur Communicative Development Inventory: Words and Sentences

Published online by Cambridge University Press:  01 June 2000

ELAINE REESE
Affiliation:
Psychology Department, University of Otago
STEPHANIE READ
Affiliation:
Psychology Department, University of Otago

Abstract

This study assessed the long-term predictive validity of the MacArthur Communicative Development Inventories: Words and Sentences (CDI[ratio ]WS; Fenson, Dale, Reznick, Thal, Bates, Hartung, Pethick & Reilly, 1993) for children's expressive and receptive vocabulary development. Sixty-one New Zealand children (31 females) were assessed with a New Zealand version of the CDI[ratio ]WS at 1;7 and 2;1 and with the Expressive Vocabulary Test (Williams, 1997) and the Peabody Picture Vocabulary Test-III (Dunn & Dunn, 1997) at 2;8 and 3;4. Excellent reliability and good predictive validity was obtained for the NZ CDI[ratio ]WS even over a 21-month delay. Predictive validity of the NZ CDI[ratio ]WS for the PPVT-III was higher for children of mothers with less education. We discuss the implications of these results for use of the CDI[ratio ]WS with children from a broad range of cultural and educational backgrounds.

Type
Research Article
Copyright
© 2000 Cambridge University Press

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Footnotes

This research was funded by a grant from the Marsden Fund of the Royal Society of New Zealand to Elaine Reese. We are grateful to Rebecca Brookland, Kate Farrant, and Keryn Harley for their assistance with data collection and to Harlene Hayne and Jacqueline Clearwater for help with recruitment. Special thanks go to the families who participated over the two years of the study.