Let's Be Explicit About the Psycholinguistic Bases of Developmental Measures: A Response to Leonard, Haebig, Deevy, and Brown (2017) Purpose The purpose of this letter is to clarify the psycholinguistic underpinnings of the tense marker total and tense agreement productivity score and to extend the discussion of when composite diversity and productivity measures are best used. Conclusion We encourage the use of composite diversity and productivity measures ... Letter to the Editor
Letter to the Editor  |   June 19, 2018
Let's Be Explicit About the Psycholinguistic Bases of Developmental Measures: A Response to Leonard, Haebig, Deevy, and Brown (2017)
 
Author Affiliations & Notes
  • Matthew Rispoli
    University of Illinois, Champaign
  • Pamela A. Hadley
    University of Illinois, Champaign
  • Disclosure: The authors have declared that no completing interests existed at the time of publication.
    Disclosure: The authors have declared that no completing interests existed at the time of publication. ×
  • Correspondence to Pamela A. Hadley: phadley@illinois.edu
  • Editor-in-Chief: Sean Redmond
    Editor-in-Chief: Sean Redmond×
Article Information
Normal Language Processing / Language / Letters to the Editor
Letter to the Editor   |   June 19, 2018
Let's Be Explicit About the Psycholinguistic Bases of Developmental Measures: A Response to Leonard, Haebig, Deevy, and Brown (2017)
Journal of Speech, Language, and Hearing Research, June 2018, Vol. 61, 1455-1459. doi:10.1044/2018_JSLHR-L-17-0488
History: Received December 29, 2017 , Accepted January 22, 2018
 
Journal of Speech, Language, and Hearing Research, June 2018, Vol. 61, 1455-1459. doi:10.1044/2018_JSLHR-L-17-0488
History: Received December 29, 2017; Accepted January 22, 2018
Web of Science® Times Cited: 1

Purpose The purpose of this letter is to clarify the psycholinguistic underpinnings of the tense marker total and tense agreement productivity score and to extend the discussion of when composite diversity and productivity measures are best used.

Conclusion We encourage the use of composite diversity and productivity measures when assessing grammar early in development, but we discourage the use of composite accuracy measures until children demonstrate emergence of diverse tense/agreement morphemes across a sufficient number of low-frequency sentence frames.

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