Sample Size for Measuring Grammaticality in Preschool Children From Picture-Elicited Language Samples Purpose The purpose of this study was to investigate whether a shorter language sample elicited with fewer pictures (i.e., 7) would yield a percent grammatical utterances (PGU) score similar to that computed from a longer language sample elicited with 15 pictures for 3-year-old children. Method Language samples were ... Research Article
Research Article  |   April 01, 2015
Sample Size for Measuring Grammaticality in Preschool Children From Picture-Elicited Language Samples
 
Author Affiliations & Notes
  • Sarita L. Eisenberg
    Montclair State University, Montclair, NJ
  • Ling-Yu Guo
    University at Buffalo–The State University of New York
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: The authors have declared that no competing interests existed at the time of publication.×
  • Correspondence to Sarita L. Eisenberg: eisenbergs@mail.montclair.edu
  • Editor: Marilyn Nippold
    Editor: Marilyn Nippold×
  • Associate Editor: Mary Alt
    Associate Editor: Mary Alt×
Article Information
Development / Language Disorders / Research Articles
Research Article   |   April 01, 2015
Sample Size for Measuring Grammaticality in Preschool Children From Picture-Elicited Language Samples
Language, Speech, and Hearing Services in Schools, April 2015, Vol. 46, 81-93. doi:10.1044/2015_LSHSS-14-0049
History: Received April 24, 2014 , Revised September 19, 2014 , Accepted November 25, 2014
 
Language, Speech, and Hearing Services in Schools, April 2015, Vol. 46, 81-93. doi:10.1044/2015_LSHSS-14-0049
History: Received April 24, 2014; Revised September 19, 2014; Accepted November 25, 2014
Web of Science® Times Cited: 1

Purpose The purpose of this study was to investigate whether a shorter language sample elicited with fewer pictures (i.e., 7) would yield a percent grammatical utterances (PGU) score similar to that computed from a longer language sample elicited with 15 pictures for 3-year-old children.

Method Language samples were elicited by asking forty 3-year-old children with varying language skills to talk about pictures in response to prompts. PGU scores were computed for each of two 7-picture sets and for the full set of 15 pictures.

Results PGU scores for the two 7-picture sets did not differ significantly from, and were highly correlated with, PGU scores for the full set and with each other. Agreement for making pass–fail decisions between each 7-picture set and the full set and between the two 7-picture sets ranged from 80% to 100%.

Conclusion The current study suggests that the PGU measure is robust enough that it can be computed on the basis of 7, at least in 3-year-old children whose language samples were elicited using similar procedures.

Acknowledgments
This project was supported by National Institute on Deafness and Other Communication Disorders (NIDCD) Grant R21DC009218, awarded to the first author, and by the Language Learning Research Grant (Blackwell Publishing), awarded to the second author. The content is solely the responsibility of the authors and does not necessarily represent the official views of NIDCD, National Institutes of Health, or Blackwell Publishing. The authors are grateful to the children who participated as well as to their parents who allowed them to participate and to the research assistants who collected, transcribed, and analyzed the samples. Portions of this study were presented at the 2013 convention of the American Speech-Language-Hearing Association in Chicago, Illinois.
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